1
WB JEE 2011
MCQ (Single Correct Answer)
+1
-0.25

$$\int {{2^x}(f'(x) + f(x)\log 2)dx} $$ is

A
$${2^x}f'(x) + C$$
B
$${2^x}f(x) + C$$
C
$${2^x}(\log 2)f(x) + C$$
D
$$(\log 2)f(x) + C$$
2
WB JEE 2026
MCQ (Single Correct Answer)
+1
-0.25
Change Language

If $\int \frac{\operatorname{cosec}^2 x-2010}{\cos ^{2010} x} d x=-\frac{f(x)}{(g(x))^{2010}}+c$, where $f\left(\frac{\pi}{4}\right)=1$; then the number of solutions of the equation $\frac{f(x)}{g(x)}=\{x\}$ in $[0,2 \pi]$ is/are (where $\{\cdot\}$ represents fractional part function)

A

3

B

1

C

0

D

2

3
WB JEE 2026
MCQ (Single Correct Answer)
+1
-0.25
Change Language

$$ \int \frac{\left(\sqrt[3]{x+\sqrt{2-x^2}}\right)\left(\sqrt[6]{1-x \sqrt{2-x^2}}\right)}{\sqrt[3]{1-x^2}} d x ;(x \in(0,1))= $$

A

$2^{\frac{1}{12}} x+c$

B

$2^{\frac{3}{4}} x+c$

C

$2^{\frac{1}{3}} x+c$

D

$2^{\frac{1}{6}} x+c$

4
WB JEE 2026
MCQ (Single Correct Answer)
+1
-0.25
Change Language

If $\int \frac{\left(1-x^2\right)}{\sqrt{x} \sqrt{\left(1+x^2\right)^3}}=\alpha \frac{x^\beta}{\left(1+x^2\right)^\gamma}+C ; \alpha, \beta, \gamma \in \mathbb{R}$ and $C$ is constant of integration, then $\alpha: \beta: \gamma$ will be

A

$4: 1: 1$

B

$2: 2: \frac{1}{2}$

C

$\frac{1}{6}: 2: \frac{1}{2}$

D

$1: 2: \frac{1}{2}$

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