\(\frac{1}{2}+-\frac{1}{5}+-\frac{5}{7}+\frac{1}{6}-\frac{3}{35}+\frac{1}{3}+\frac{1}{41}=\frac{1}{41}\)
1/41 giai ra dai nam cu rut gon roi quy dong
\(\frac{1}{2}+\left(-\frac{1}{5}\right)+\left(-\frac{5}{7}\right)+\frac{1}{6}+\left(-\frac{3}{35}\right)+\frac{1}{3}+\frac{1}{41}\)
\(=\left(\frac{1}{2}+\frac{1}{6}+\frac{1}{3}\right)+\left[\left(\frac{-1}{5}\right)+\left(-\frac{5}{7}\right)+\left(-\frac{3}{35}\right)\right]+\frac{1}{41}\)
\(=1+\left(-1\right)+\frac{1}{41}\)
=0+1/41=1/41
\(\frac{1}{2}+\)\(-\frac{1}{5}+-\)\(\frac{5}{7}+\)\(\frac{1}{6}\)\(-\frac{3}{35}+\)\(\frac{1}{3}+\)\(\frac{1}{41}=\)\(\frac{1}{41}\)
1/2+1/4+1/8+1/16+1/32+1/64
Các bạn giải từng bước giúp mình nhé
camr ơn
Hai nhân ba nhân bốn nhân bẩy phần tám nhân 21