Which of the following is function - Vidyadip

MCQ

Which of the following is function

A
$y = \sqrt x - \left| x \right|;\,\,x \in R$
✓
$y = \sqrt x - \left| x \right|;\,\,x \ge 1$
C
$x = {y^2}$
D
none

✓

Answer

Correct option: B.

$y = \sqrt x - \left| x \right|;\,\,x \ge 1$

b

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