જો $f(x) = \int_a^x {t^3 e^t \, dt}$ હોય,તો $\frac{d}{dx} f(x) = $

$\int_0^\pi x \sin^4 x \cos^6 x \, dx =$

$\mathop {Limit}\limits_{x \to {x_1}} \,\,\frac{x}{{x - {x_1}}}\,\,\int\limits_{{x_1}}^x {f(t)} \, dt$ ની કિંમત શોધો:

$\lim _{n \rightarrow \infty} \frac{1}{n}\left\{\sin ^5\left(\frac{\pi}{6 n}\right)+\sin ^5\left(\frac{2 \pi}{6 n}\right)+\sin ^5\left(\frac{3 \pi}{6 n}\right)+\ldots+\sin ^5\left(\frac{\pi}{2}\right)\right\} = $

ધારો કે રેખા $45 x+5 y+3=0$ નો ઢાળ $27 r_1+\frac{9 r_2}{2}$ છે,જ્યાં $r_1, r_2 \in R$. તો $\lim_{x \rightarrow 3} \left( \int_3^x \frac{8 t^2}{\frac{3 r_2 x}{2}-r_2 x^2-r_1 x^3-3 x} dt \right)$ ની કિંમત ................... છે.

ધારો કે $f(x) = \left| \begin{array}{ccc} \sec x & \cos x & \sec^2 x + \cot x \csc x \\ \cos^2 x & \cos^2 x & \csc^2 x \\ 1 & \cos^2 x & \cos^2 x \end{array} \right|$,તો $\int_0^{\pi /2} f(x) dx = $