\(\left(\dfrac{3}{5}\right)^5.x=\left(\dfrac{3}{5}\right)^7\)
\(\Rightarrow x=\left(\dfrac{3}{5}\right)^7:\left(\dfrac{3}{5}\right)^5\)
\(\Rightarrow x=\left(\dfrac{3}{5}\right)^2=\dfrac{9}{25}\)
Vậy x \(\dfrac{9}{25}\)
\(\left(\dfrac{3}{5}\right)^5.x=\left(\dfrac{3}{7}\right)^7\)
\(x=\left(\dfrac{3}{7}\right)^7:\left(\dfrac{3}{5}\right)^5\)
\(x=\left(\dfrac{3}{7}:\dfrac{3}{5}\right)^5.\left(\dfrac{3}{7}\right)^2\)
\(x=\left(\dfrac{5}{7}\right)^5.\dfrac{9}{49}\)
\(x=\left(\dfrac{5}{7}\right)^5.\dfrac{9}{49}\)
\(x=\dfrac{3125}{16807}.\dfrac{9}{49}\)
\(x=\dfrac{28125}{823543}\)
Ps lớn quá ko bt cách giải đúng hay sai nha
