નીચેના સંકલનનું મૂલ્ય શોધો:
$\int_{4}^{9} \frac{\sqrt{x}}{\left(30-x^{\frac{3}{2}}\right)^{2}} d x$

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(A) ધારો કે $I = \int_{4}^{9} \frac{\sqrt{x}}{\left(30-x^{\frac{3}{2}}\right)^{2}} d x$.
આપણે આદેશની રીતનો ઉપયોગ કરીશું. ધારો કે $t = 30 - x^{\frac{3}{2}}$.
તેથી,$dt = -\frac{3}{2} x^{\frac{1}{2}} dx$,જેનો અર્થ છે કે $\sqrt{x} dx = -\frac{2}{3} dt$.
જ્યારે $x = 4$,ત્યારે $t = 30 - 4^{\frac{3}{2}} = 30 - 8 = 22$.
જ્યારે $x = 9$,ત્યારે $t = 30 - 9^{\frac{3}{2}} = 30 - 27 = 3$.
આ કિંમતોને સંકલનમાં મૂકતા:
$I = \int_{22}^{3} -\frac{2}{3} \frac{dt}{t^2} = \frac{2}{3} \int_{3}^{22} t^{-2} dt$.
$I = \frac{2}{3} \left[ -\frac{1}{t} \right]_{3}^{22} = \frac{2}{3} \left( -\frac{1}{22} - (-\frac{1}{3}) \right) = \frac{2}{3} \left( \frac{1}{3} - \frac{1}{22} \right)$.
$I = \frac{2}{3} \left( \frac{22 - 3}{66} \right) = \frac{2}{3} \left( \frac{19}{66} \right) = \frac{19}{99}$.

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