फलन $(ax+b)(cx+d)^{2}$ का $x$ के सापेक्ष अवकलज ज्ञात कीजिए,जहाँ $a, b, c, d$ अचर हैं।

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माना $f(x) = (ax+b)(cx+d)^{2}$.
गुणन नियम $\frac{d}{dx}[u(x)v(x)] = u(x)v'(x) + v(x)u'(x)$ का उपयोग करने पर:
$f'(x) = (ax+b) \frac{d}{dx}(cx+d)^{2} + (cx+d)^{2} \frac{d}{dx}(ax+b)$
श्रृंखला नियम (chain rule) से $\frac{d}{dx}(cx+d)^{2} = 2(cx+d) \cdot c = 2c(cx+d)$:
$f'(x) = (ax+b)[2c(cx+d)] + (cx+d)^{2}(a)$
$(cx+d)$ को उभयनिष्ठ लेने पर:
$f'(x) = (cx+d)[2c(ax+b) + a(cx+d)]$
$f'(x) = (cx+d)[2acx + 2bc + acx + ad]$
$f'(x) = (cx+d)(3acx + 2bc + ad)$

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