फलन $\frac{x}{9-4x^{2}}$ का समाकलन कीजिए।

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(N/A) माना $I = \int \frac{x}{9-4x^{2}} dx$.
$t = 9-4x^{2}$ प्रतिस्थापित करने पर.
अतः,$dt = -8x dx$,जिसका अर्थ है कि $x dx = -\frac{1}{8} dt$.
इन मानों को समाकलन में रखने पर:
$I = \int \frac{1}{t} \left(-\frac{1}{8}\right) dt$
$I = -\frac{1}{8} \int \frac{1}{t} dt$
$I = -\frac{1}{8} \log |t| + C$
अब $t = 9-4x^{2}$ वापस रखने पर:
$I = -\frac{1}{8} \log |9-4x^{2}| + C$,जहाँ $C$ एक स्वेच्छ अचर है।

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