If y = f(x) = x + 2 x - 1 , then x = - Vidyadip

MCQ

If $y = f(x) = \frac{{x + 2}}{{x - 1}}$, then $x = $

✓
$f(y)$
B
$2f(y)$
C
$\frac{1}{{f(y)}}$
D
None of these

✓

Answer

Correct option: A.

$f(y)$

a
(a) $y = \frac{{x + 2}}{{x - 1}}\,\,$

$\Rightarrow \,\,x = \frac{3}{{y - 1}} + 1 = \frac{{y + 2}}{{y - 1}} = f(y)$.

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