Tính nhanh
----- Nội dung ảnh -----
Bài 12. Tính nhàn:
a)
\[
-1 + \frac{1}{99} + \frac{1}{99.98} + \frac{1}{98.97} + \frac{1}{97.96} + \frac{1}{3.2} + \frac{1}{2.1}
\]
b)
\[
\frac{1}{50} + \frac{1}{50.49} + \frac{1}{49.48} + \frac{1}{2.1}
\]
c)
\[
\frac{1}{11} + \frac{1}{209} + \frac{1}{513} + \frac{1}{945} + \frac{1}{1505} + \frac{1}{2193}
\]
Bài 12. Tính nhàn:
a)
\[
-1 + \frac{1}{99} + \frac{1}{99.98} + \frac{1}{98.97} + \frac{1}{97.96} + \frac{1}{3.2} + \frac{1}{2.1}
\]
b)
\[
\frac{1}{50} + \frac{1}{50.49} + \frac{1}{49.48} + \frac{1}{2.1}
\]
c)
\[
\frac{1}{11} + \frac{1}{209} + \frac{1}{513} + \frac{1}{945} + \frac{1}{1505} + \frac{1}{2193}
\]