Question

\( \left(8x-1\right)^{2n-1}:5=5^{2n}\)

\(\left(x-\dfrac{2}{9}\right)^3=\left(\dfrac{2}{3}\right)^6\)

\(\text{đề bài là tìm x nhá mn}\)

Answer 1

b) \(\left(x-\dfrac{2}{9}\right)^3=\left(\dfrac{2}{3}\right)^6\)

\(\Rightarrow\left(x-\dfrac{2}{9}\right)^3=\left[\left(\dfrac{2}{3}\right)^2\right]^3=\left(\dfrac{4}{9}\right)^3\)

\(\Rightarrow x-\dfrac{2}{9}=\dfrac{4}{9}\)

\(\Rightarrow x=\dfrac{2}{3}\)

Answer 2

Thui làm hộ cho:

\(\left(8x-1\right)^{2n-1}:5=5^{2n}\)

\(\left(8x-1\right)^{2n-1}=5^{2n}.5\)

mà àm cho khỏi nhân 5 hay chia 5 vậy