Tìm x, biết
Bài 2: Tìm x, biết:
2^x . 4 = 128
x^15 = x
(x^5)^10 = x
2x . ( 2^2)^2 = ( 2^3)^2
3^2 . ( x + 4 ) - 5^2 = 5.2^2
( 7 - x ) - ( 25 + 7 ) = -25
2^x . 4 = 128
x^15 = x
(x^5)^10 = x
2x . ( 2^2)^2 = ( 2^3)^2
3^2 . ( x + 4 ) - 5^2 = 5.2^2
( 7 - x ) - ( 25 + 7 ) = -25