Question

please help quickly.... ​

Answer 1

EXPLANATION :

$\sf {( \frac{x}{y} )}^{n - 1} = {( \frac{y}{x}) }^{n - 3}$

$\sf \implies {( \frac{x}{y}) }^{n - 1} = {( \frac{x}{y}) }^{ - (n - 3)}$

$\sf \implies \: n - 1 = 3 - n$

$\sf \implies \: \bold{ \boxed{ \mathfrak{n = 2}}}$