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Function — Statistics STD 11 Commerce — Question

Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsFunction2 Marks
Question
If $f(x)=\frac{2 x-4}{x+7}$ is a real function then for which value of $x$ the image is zero?
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Answer

$f(x)=\frac{2 x-4}{x+7}$
Image $=0$. Therefore, put $f(x)=0$
$0=\frac{2 x-4}{x+7}$
$\therefore 0=2 x-4 \therefore 4=2 x$
Therefore, $x=2$, the image is zero.

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