JEE MATHEMATICS MCQ: INCREASING & DECREASING

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Analyzing +4 | -1

The function

f\left( x \right) = \cos \left( {\pi /x} \right)

is increasing in the interval

View answer and explanation

Correct option: D

None of these

None of the provided options are correct. The function is increasing in the interval

(\frac{1}{2n+1}, \frac{1}{2n})

for

n \in N

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f\left( x \right) = \frac{{K\sin x + 2\cos x}}{{\sin x + \cos x}}

x

f\left( x \right) = {x^2} + ax + 1

a

f(x)=

\sin x-\cos x-a x+b

f(x)=x e^{x(1-x)}, x \in R

f

g

fog

f\left( x \right) = {x^3} + b{x^2} + cx + d

0 < {b^2} < c

\left( { - \infty ,\;\infty } \right)