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Sets — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsSets1 Mark
MCQ
The range of the function $f(x) = 3x - 2‚$ is.
  • ✓
    $(-\infty,\infty)$
  • B
    $\text{R}-(3)$
  • C
    $(-\infty,0)$
  • D
    $(0,- \infty)$
✓

Answer

Correct option: A.
$(-\infty,\infty)$
Let the given function is
$y = 3x - 2$
$\Rightarrow y + 2 = 3x$
$\Rightarrow \text{x} =\frac{(\text{y}+2)}{3}$
Now $x$ is satisfied by all values.
So, Range ${f(x)} = R =(-\infty,\infty)$

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