MCQ
જો $f(x) = \frac{x}{{x - 1}} = \frac{1}{y}$, તો $f(y) = $
- A$x$
- B$x + 1$
- C$x - 1$
- ✓$1 - x$
$\Rightarrow \,\,\frac{{ - 1}}{{x - 1}} = \frac{{y - 1}}{y}$ {Applying dividendo}
$ \Rightarrow \,\,\frac{{x - 1}}{{ - 1}} = \frac{y}{{y - 1}}\, $
$\Rightarrow \,\, - x + 1 = f(y).$
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