फलन का समाकलन कीजिए: $\frac{1}{x^{\frac{1}{2}}+x^{\frac{1}{3}}}$

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माना $x = t^{6}$,तब $dx = 6t^{5} dt$ है।
समाकल में इन मानों को प्रतिस्थापित करने पर:
$\int \frac{1}{x^{1/2} + x^{1/3}} dx = \int \frac{6t^{5}}{t^{3} + t^{2}} dt$
$= \int \frac{6t^{5}}{t^{2}(t + 1)} dt = 6 \int \frac{t^{3}}{t + 1} dt$
बहुपद विभाजन करने पर,$\frac{t^{3}}{t + 1} = t^{2} - t + 1 - \frac{1}{t + 1}$ प्राप्त होता है।
अतः,समाकल इस प्रकार होगा:
$6 \int (t^{2} - t + 1 - \frac{1}{t + 1}) dt = 6 [\frac{t^{3}}{3} - \frac{t^{2}}{2} + t - \log|t + 1|] + C$
$= 2t^{3} - 3t^{2} + 6t - 6 \log|t + 1| + C$
चूंकि $t = x^{1/6}$ है,मान वापस रखने पर:
$= 2x^{1/2} - 3x^{1/3} + 6x^{1/6} - 6 \log|x^{1/6} + 1| + C$

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