int_{0}^{a} (a-x)^{frac{3}{2}} x^{2} dx = | vedclass

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(B) ધારો કે $I = \int_{0}^{a} (a-x)^{\frac{3}{2}} x^{2} dx$. ગુણધર્મ $\int_{0}^{a} f(x) dx = \int_{0}^{a} f(a-x) dx$ નો ઉપયોગ કરતા,આપણને મળે છે: $I =

Vedclass · Accepted Answer

$\frac{16 a^{\frac{9}{2}}}{315}$

Vedclass · Answer

(B) ધારો કે $I = \int_{0}^{a} (a-x)^{\frac{3}{2}} x^{2} dx$. ગુણધર્મ $\int_{0}^{a} f(x) dx = \int_{0}^{a} f(a-x) dx$ નો ઉપયોગ કરતા,આપણને મળે છે: $I = \int_{0}^{a} (a-(a-x))^{\frac{3}{2}} (a-x)^{2} dx = \int_{0}^{a} x^{\frac{3}{2}} (a^{2} - 2ax + x^{2}) dx$. $I = \int_{0}^{a} (a^{2} x^{\frac{3}{2}} - 2a x^{\frac{5}{2}} + x^{\frac{7}{2}}) dx$. દરેક પદનું સંકલન કરતા: $I = a^{2} \left[ \frac{x^{\frac{5}{2}}}{\frac{5}{2}} \right]_{0}^{a} - 2a \left[ \frac{x^{\frac{7}{2}}}{\frac{7}{2}} \right]_{0}^{a} + \left[ \frac{x^{\frac{9}{2}}}{\frac{9}{2}} \right]_{0}^{a}$. $I = \frac{2}{5} a^{2} (a^{\frac{5}{2}}) - 2a \left( \frac{2}{7} a^{\frac{7}{2}} \right) + \frac{2}{9} a^{\frac{9}{2}}$. $I = \frac{2}{5} a^{\frac{9}{2}} - \frac{4}{7} a^{\frac{9}{2}} + \frac{2}{9} a^{\frac{9}{2}}$. $I = a^{\frac{9}{2}} \left( \frac{2}{5} - \frac{4}{7} + \frac{2}{9} \right) = a^{\frac{9}{2}} \left( \frac{126 - 180 + 70}{315} \right) = \frac{16}{315} a^{\frac{9}{2}}$.

$\int_{0}^{a} (a-x)^{\frac{3}{2}} x^{2} dx =$

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