Question

bạn nào nhanh nhất mik sẽ tick nha

Answer 1

c) \(\dfrac{2^3+2^4+2^5+2^6}{15^2}\)

\(=\dfrac{2^3\cdot\left(1+2+2^2+2^3\right)}{15^2}\)

\(=\dfrac{2^3\cdot15}{15\cdot15}\)

\(=\dfrac{2^3}{15}\)

\(=\dfrac{8}{15}\)

Answer 2

c) \(\dfrac{2^3\left(1+2+2^2+2^3\right)}{15^2}=\dfrac{2^3.15}{15^2}=\dfrac{8}{15}\)