Question

tìm x bik (3/5)^5 . x = (3/4)^7

giúp ik vs

cẻm ơn céc bẹn nhiều

Answer 1

                                                         Bài giải

\(\left(\frac{3}{5}\right)^5\cdot x=\left(\frac{3}{4}\right)^7\)

\(\frac{3^5}{5^5}\cdot x=\frac{3^7}{4^7}\)

\(x=\frac{3^7}{4^7}\text{ : }\frac{3^5}{5^5}=\frac{3^7}{4^7}\cdot\frac{5^5}{3^5}=\frac{3^2\cdot5^5}{4^7}=\frac{28125}{16384}\)