Differentiate :
$(2 x + 1)^{3}$

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Solution

Differentiate,
$\frac{d}{d x} {(2 x + 1)}^{3}$
$= \frac{d {(2 x + 1)}^{3}}{d (2 x + 1)} \frac{d (2 x + 1)}{d x}$
$= 3 {(2 x + 1)}^{2} \times 2$
$= 6 {(2 x + 1)}^{2}$
Hence, the answer is $6 {(2 x + 1)}^{2} .$

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