$\sqrt{\frac{(x-3)(x^{2}+4)}{3x^{2}+4x+5}}$ का $x$ के सापेक्ष अवकलन कीजिए।

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माना $y = \sqrt{\frac{(x-3)(x^{2}+4)}{3x^{2}+4x+5}}$.
दोनों पक्षों का प्राकृतिक लघुगणक (logarithm) लेने पर:
$\log y = \frac{1}{2} [\log(x-3) + \log(x^{2}+4) - \log(3x^{2}+4x+5)]$.
दोनों पक्षों का $x$ के सापेक्ष अवकलन करने पर:
$\frac{1}{y} \frac{dy}{dx} = \frac{1}{2} \left[ \frac{d}{dx}(\log(x-3)) + \frac{d}{dx}(\log(x^{2}+4)) - \frac{d}{dx}(\log(3x^{2}+4x+5)) \right]$.
श्रृंखला नियम (chain rule) लागू करने पर:
$\frac{1}{y} \frac{dy}{dx} = \frac{1}{2} \left[ \frac{1}{x-3} + \frac{2x}{x^{2}+4} - \frac{6x+4}{3x^{2}+4x+5} \right]$.
अतः,अवकलज है:
$\frac{dy}{dx} = \frac{1}{2} \sqrt{\frac{(x-3)(x^{2}+4)}{3x^{2}+4x+5}} \left[ \frac{1}{x-3} + \frac{2x}{x^{2}+4} - \frac{6x+4}{3x^{2}+4x+5} \right]$.

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