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(α) ⊥ (β)., a. ………………………….., à ………………………………………………………………………………….., A₂, A₄, “a”, ∠A₄, a……….., à ………………………………………………………………………………………, à………………………………………………………………………………………., à ……………………………………………………………………………………., à ……………………………………………………………………………………, à ...……………………………………………………………………………………., (a</h1><span class="left">" có trong những liên kết dưới đây, nhấp chuột để xem chi tiết:</span></div></div><div id="filter_stage"><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/huong-lien.to" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1459395929_pokemon.png"/> </a></div><div class="lz-question--header_username"><a href="/user/huong-lien.to" target="_blank"> Tô Hương Liên </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tieng-anh/lop-9"><b>Tiếng Anh - Lớp 9</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">20/12 14:32:57</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2374938/read-the-following-passage-and-write-the-correct-letter-a-b-or-c-a-it-is-estimated-that-about"> Read the following passage and write the correct letter A, B, or C. A. It is estimated that about 40% of the world’s population use social media, and many of these billions of social media users look up to influencers to help them decide what to buy and what trends to follow. An influencer is a person who can influence the decisions of their followers because of their relationship with their audience and their knowledge and expertise in a particular area, e.g. fashion, travel or technology. B. ... </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2374938"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/bao-ngoc.tran" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1459388582_cat-10.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/bao-ngoc.tran" target="_blank"> Trần Bảo Ngọc </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/toan-hoc/lop-5"><b>Toán học - Lớp 5</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">16/12 22:33:40</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2371559/dien-so-thich-hop-vao-o-trongaba-bb-a2-53-95-24-6"> Điền số thích hợp vào ô trốngaba × bb × a2,53,95,24,6 </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2371559"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/dan-phuong.tran" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1459389638_doremon.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/dan-phuong.tran" target="_blank"> Trần Đan Phương </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/ngu-van/lop-9"><b>Ngữ văn - Lớp 9</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">15/12 15:10:05</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2369974/doc-van-ban-sau-a-hay-song-nhu-doi-song-de-biet-yeu-nguon-coi-hay-song-nhu-doi-nui-vuon-toi-nhung"> Đọc văn bản sau: (a) Hãy sống như đời sống để biết yêu nguồn cội Hãy sống như đồi núi vươn tới những tầm cao Hãy sống như biển trào, như biển trào để thấy bờ bến rộng Hãy sống như ước vọng để thấy đời mênh mông Và sao không là gió, là mây để thấy trời bao la Và sao không là phù sa rót mỡ màu cho hoa Sao không là bài ca của tình yêu đôi lứa Sao không là mặt trời gieo hạt nắng vô tư Và sao không là bão, là giông, là ánh lửa đêm đông Và sao không là hạt giống xanh đất mẹ bao dung Sao không là ... </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2369974"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/vietnam.toiyeu" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1459239207_toi-yeu-vn-2.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/vietnam.toiyeu" target="_blank"> Tôi yêu Việt Nam </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tin-hoc/lop-9"><b>Tin học - Lớp 9</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">13/12 11:21:00</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2367938/cau-2-2-0-diem-cho-bang-du-lieu-nhap-hang-cua-hang-hoa-qua-nhu-sau-a-b-1-loai"> Câu 2 (2,0 điểm). Cho bảng dữ liệu nhập hàng của hàng hoa quả như sau A B 1 Loại Số lượng 2 Táo 32 3 Cam 54 4 Thanh long 75 5 Lê 86 Hãy ghép mỗi yêu cầu ở cột A với công thức đúng ở cột B. A B 1) Đếm loại hoa quả có số lượng lớn hơn 55. a) =COUNTIF(B2:B5,"<40") 2) Đếm loại hoa quả có số lượng nhỏ hơn 75. b) =COUNTIF(B2:B5,">=30")-COUNTIF(B2:B5,">80") 3) Đếm loại hoa quả có số lượng trong khoảng từ 30 đến 80. c) ... </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2367938"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/thu-ha.le39" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1722845058_lazi_952249.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/thu-ha.le39" target="_blank"> Lã Huyen </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/toan-hoc/lop-12"><b>Toán học - Lớp 12</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">11/12 21:26:54</div></div><div class="lz-question--header__right">Giải bài có thưởng!</div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2366999/cho-ham-so-fx-ax3-bx-a-b-in-mathbbr-co-bang-xet-dau-dao-ham-nhu-sau"> Cho hàm số \( f(x) = ax^3 + bx, (a, b \in \mathbb{R}) \) có bảng xét dấu đạo hàm như sau: </a></div><div class="lz-question-content_img content_expandable"><a href="/edu/exercise/2366999/cho-ham-so-fx-ax3-bx-a-b-in-mathbbr-co-bang-xet-dau-dao-ham-nhu-sau"> <img src="https://cdn.lazi.vn/storage/uploads/edu/exercise/1733927443_lazi_589486.jpeg"/> </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>0</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2366999"> + Trả lời <span>+5 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/thu-hien.nguyen" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1602799746_lazi_5f88c8827168f.png"/> </a></div><div class="lz-question--header_username"><a href="/user/thu-hien.nguyen" target="_blank"> Nguyễn Thu Hiền </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tieng-viet/lop-1"><b>Tiếng Việt - Lớp 1</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">10/12 23:30:23</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2366331/sap-xep-cac-tu-sau-de-tao-thanh-cau-roi-viet-lai-cho-dung-a-nho-tay-truoc-em-rua-an-khi-a"> Sắp xếp các từ sau để tạo thành câu rồi viết lại cho đúng: a. nhớ, tay, trước, em, rửa, ăn, khi à ...……………………………………………………………………………………. b. cần, trẻ em, bố, mẹ, vâng lời à ...……………………………………………………………………………………. </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>2</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2366331"> + Trả lời <span>+3 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/van-phu.pham" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/avatar_small.png"/> </a></div><div class="lz-question--header_username"><a href="/user/van-phu.pham" target="_blank"> Phạm Văn Phú </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tieng-viet/lop-1"><b>Tiếng Việt - Lớp 1</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">10/12 23:30:21</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2366325/sap-xep-cac-tu-sau-de-tao-thanh-cau-roi-viet-lai-cho-dung-a-xanh-rop-san-bong-cay-truong-em-a"> Sắp xếp các từ sau để tạo thành câu rồi viết lại cho đúng: a. xanh rợp, sân, bóng cây, trường em à …………………………………………………………………………………… b. đọc, Lan, giờ ra chơi, Nga, truyện, và à …………………………………………………………………………………… </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2366325"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/vietnam.toiyeu" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1459239207_toi-yeu-vn-2.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/vietnam.toiyeu" target="_blank"> Tôi yêu Việt Nam </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tieng-viet/lop-1"><b>Tiếng Việt - Lớp 1</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">10/12 23:30:15</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2366305/sap-xep-cac-tu-sau-de-tao-thanh-cau-roi-viet-lai-cho-dung-a-sach-se-cua-lop-hoc-luon-chung-em"> Sắp xếp các từ sau để tạo thành câu rồi viết lại cho đúng: a. sạch sẽ, của, lớp học, luôn, chúng em à ……………………………………………………………………………………… b. điều hay, cô giáo, chúng tôi, nhiều, dạy à ……………………………………………………………………………………… </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2366305"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/thanh-trung.dang" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1633218909_lazi_224102.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/thanh-trung.dang" target="_blank"> CenaZero♡ </a></div><div class="lz-dot"></div><div 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</a></div></div></div><div class="nen_trang_full lz-question"><div class="lz-question--header"><div class="lz-question--header__left"><div class="lz-question--header_avatar"><a href="/user/minh-tri.pham" target="_blank"> <img src="https://cdn.lazi.vn/storage/uploads/users/avatar_thumb/1651738449_lazi_750735.jpg"/> </a></div><div class="lz-question--header_username"><a href="/user/minh-tri.pham" target="_blank"> Phạm Minh Trí </a></div><div class="lz-dot"></div><div class="lz-question--header_subject"><a target="_blank" href="/edu/lists/tieng-viet/lop-1"><b>Tiếng Việt - Lớp 1</b></a></div><div class="lz-dot"></div><div class="lz-question--header_time">10/12 23:30:08</div></div><div class="lz-question--header__right"></div></div><div class="lz-question--content"><div class="lz-question-content_text"><a href="/edu/exercise/2366278/sap-xep-cac-tu-sau-de-tao-thanh-cau-roi-viet-lai-cho-dung-a-di-choi-em-cung-ngay-nghi-gia-dinh"> Sắp xếp các từ sau để tạo thành câu rồi viết lại cho đúng: a. đi chơi, em, cùng, ngày nghỉ, gia đình à ……………………………………………………………………………………. b. âu yếm, gà mẹ, nhìn, đàn con à ……………………………………………………………………………………. </a></div></div><div class="lz-question--footer"><div class="lz-question--footer_ans"><img src="https://lazi.vn/system/cms/themes/mytheme/new_layout/uploads/new_layout/images/ans.svg"/> <span>1</span></div><div class="lz-question--footer_btn"><a href="/edu/reply/2366278"> + Trả lời <span>+4 điểm</span> </a></div></div></div><div class="paging_wrapper"><div class="pagination"><div><div id="paging_box"><div class="paginate"><div class="pagination"><ul><div class="button2-right"><span class="start"><a href="edu/tag/a?start=0"><<</a></span></div><div class="button2-right off"><span class="prev"><</span></div><div class="button2-left"><div class="page"><span class="current roundedBordersLite">1</span><span><a href="edu/tag/a?start=10">2</a></span><span><a href="edu/tag/a?start=20">3</a></span><span><a href="edu/tag/a?start=30">4</a></span><span><a 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