$\int \frac{e^{x^2}\left(2 x+x^3\right)}{\left(3+x^2\right)^2} d x$ is equal to
$\frac{e^{x^2}}{\left(3+x^2\right)}+c$
$\frac{1}{4} \frac{e^{x^2}}{\left(3+x^2\right)}+c$
$\frac{1}{8} \frac{e^{x^2}}{\left(3+x^2\right)}+c$
$\frac{1}{2} \frac{e^{x^2}}{\left(3+x^2\right)}+c$
If $a$ and $b$ are two complex numbers, then the sum of $(n+1)$ terms of the series $a c_0-(a+d) c_1+(a+2 d) c_2-(a+3 d) c_3+$ $\_\_\_\_$ is
$\frac{a}{2^n}$
na
0
None of these
Let $f: R \rightarrow R, f(x)=x^3-3 x^2+3 x-2$, then $f^{-1}(x)$ is given by
$1+\sqrt[3]{x+1}$
$1-\sqrt[3]{x+1}$
$\sqrt[3]{x+1}-1$
$\sqrt[3]{x-1}-1$
The least positive non-integral solution of the equation $\sin \pi\left(x^2+x\right)=\sin \pi x^2$ is
Rational
Irrational of form $\sqrt{p}$
Irrational of the form $\frac{\sqrt{p}-1}{4}$, where $p$ is an odd integer
Irrational of the form $\frac{\sqrt{p}+1}{4}$, where $p$ is an even integer
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