🛠️ JEE➗ Maths

Let \( g(x)=f(x)+f(1-x) \) and \( f^{\prime \prime}(x)>0, x \in(0,1) \). If \( g \) is decreasing in the interval \( …

Q1

Let \( g(x)=f(x)+f(1-x) \) and \( f^{\prime \prime}(x)>0, x \in(0,1) \). If

\( g \) is decreasing in the interval \( (0, \alpha) \) and increasing

in the interval \( (\alpha, 1) \), then the value of

\( \tan ^{-1}(2 \alpha)+\tan ^{-1}\left(\frac{1}{\alpha}\right)+\tan ^{-1}\left(\frac{\alpha+1}{\alpha}\right) \), is equal to

a

\( \frac{3 \pi}{2} \)

b

\( \pi \)

c

\( \frac{5 \pi}{4} \)

d

\( \frac{3 \pi}{4} \)

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