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Applied Mathematics · 2023 · 1 mark
CBSE 2023 · Central · Set 4 · Q19
Questions number 19 and 20 are Assertion and Reason based questions carrying 1 mark each. Two statements are given, one labelled Assertion (A) and…
Questions number $\displaystyle 19$ and $\displaystyle 20$ are Assertion and Reason based questions carrying $\displaystyle 1$ mark each. Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (a), (b), (c) and (d) as given below.
Assertion (A): The function $\displaystyle \mathrm{f}(\mathrm{x})=(\mathrm{x}+2) \mathrm{e}^{-\mathrm{x}}$ is increasing in the interval $\displaystyle (-1, \infty)$.
Reason (R): A function f(x) is increasing, if $\displaystyle \mathrm{f}^{\prime}(\mathrm{x})>0$.
Official answer
(D)
Assertion (A) is false and Reason (R) is true.
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CBSE Class 12 Applied Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.