Question

if f(x) =(x÷x-1)x≠1.Find f of (x)​

Answer 1

Answer:

$f(f(x)) = f( \frac{x}{x - 1} ) = \frac{ \frac{x}{x - 1} }{ \frac{x}{x - 1} - 1 } = \frac{x}{x - 1} \times \frac{x - 1}{x - x + 1} = x$

so fof = x, x not equal to 1.