Question

tìm x; (3/5)^5.x=(3/7)^7

Answer 1

\(\left(\dfrac{3}{5}\right)^5.x=\left(\dfrac{3}{5}\right)^7\)

\(\Rightarrow x=\left(\dfrac{3}{5}\right)^7:\left(\dfrac{3}{5}\right)^5\)

\(\Rightarrow x=\left(\dfrac{3}{5}\right)^2=\dfrac{9}{25}\)

Vậy x \(\dfrac{9}{25}\)

Answer 2

\(\left(\dfrac{3}{5}\right)^5.x=\left(\dfrac{3}{7}\right)^7\)

\(x=\left(\dfrac{3}{7}\right)^7:\left(\dfrac{3}{5}\right)^5\)

\(x=\left(\dfrac{3}{7}:\dfrac{3}{5}\right)^5.\left(\dfrac{3}{7}\right)^2\)

\(x=\left(\dfrac{5}{7}\right)^5.\dfrac{9}{49}\)

\(x=\left(\dfrac{5}{7}\right)^5.\dfrac{9}{49}\)

\(x=\dfrac{3125}{16807}.\dfrac{9}{49}\)

\(x=\dfrac{28125}{823543}\)

Ps lớn quá ko bt cách giải đúng hay sai nha