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Applications of Derivatives — Maths STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceMathsApplications of Derivatives2 Marks
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Answer

Correct option: A.
$x \in R$
(a): Let $x_1, x_2 \in R$ be s.t. $x_2>x_1$ then $7 x_2>7 x_1$
$
\Rightarrow 7 x_2+9>7 x_1+9
$
Thus, $x_2>x_1 \Rightarrow f\left(x_2\right)>f\left(x_1\right)$ for all $x \in R$

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