\(B=\frac{17}{10}+\frac{17}{40}+\frac{17}{188}+\frac{17}{154}+\frac{17}{238}\)

\(B=\frac{17}{2.5}+\frac{17}{8.5}+\frac{17}{11.8}+\frac{17}{11.14}+\frac{17}{14.17}\)

\(\frac{3}{17}B=\frac{3}{2.5}+\frac{3}{8.5}+\frac{3}{11.8}+\frac{3}{11.14}+\frac{3}{14.17}\)

\(\frac{3}{17}B=\frac{1}{2}-\frac{1}{5}+\frac{1}{5}-\frac{1}{8}+...+\frac{1}{14}-\frac{1}{17}\)

\(\frac{3}{17}B=\frac{1}{2}-\frac{1}{17}=\frac{17}{34}-\frac{2}{34}=\frac{15}{34}\)

\(B=\frac{15}{34}:\frac{3}{17}=\frac{15}{34}.\frac{17}{3}=\frac{5}{2}\)

Học tốt!!!

17/(10+40+88+154+238)

17/530

\(8^8+2^{20}\)

\(=\left(2^3\right)^8+2^{20}\)

\(=2^{24}+2^{20}\)

\(=2^{20}\left(2^4+1\right)\)

\(=2^{20}\cdot17⋮17\)

\(\dfrac{-33}{88}=\dfrac{-3}{8};11.8-\dfrac{11.3}{17-6}=88-\dfrac{33}{11}=88-3=85.\)

thiếu một câu bạn ơi

a, Ta có  16 5 + 2 15 = 2 4 5 + 2 15 = 2 20 + 2 15 =  2 15 2 5 + 1 = 2 15 . 33  chia hết cho 33

b, Ta có:  8 8 + 4 10 = 2 3 8 + 2 2 10 = 2 24 + 2 20 =  2 20 2 4 + 1 = 2 20 . 17  chia hết cho 17