Cách làm thì t chịu

\(n=2\)
 

\(\text{Đặt tổng trên = A}\)

\(A=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}\)

\(Ax2=1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\)

\(Ax2-A=\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)-\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}\right)\)

\(A=1-\frac{1}{32}=\frac{31}{32}\)

219023:467=469

4090626:843ko chia được

1 yen = 10 kg

10 tạ = 1000 kg

1 tấn = 1000 kg

10 tấn = 10000 kg

=4567

=2735

* \(195924:348=563\)

* \(316100:436=725\)

(Good luck!)

35 - 10 = 25

0.1=1/10

176966:38 = 4657

207860:76=2735