# X5 (3 − 6x−9) - Mathematics

x5 (3 − 6x−9

#### Solution

$\text{ Let } u = x^5 ; v = \left( 3 - 6 x^{- 9} \right)$
$\text{ Then }, u' = 5 x^4 ; v' = 54 x^{- 10}$
$\text{ Using theproduct rule }:$
$\frac{d}{dx}\left( uv \right) = uv' + vu'$
$\frac{d}{dx}\left[ x^5 \left( 3 - 6 x^{- 9} \right) \right] = x^5 \left( 54 x^{- 10} \right) + \left( 3 - 6 x^{- 9} \right)\left( 5 x^4 \right)$
$= 54 x^{- 5} + 15 x^4 - 30 x^{- 5}$
$= 15 x^4 + 24 x^{- 5}$

Concept: The Concept of Derivative - Algebra of Derivative of Functions
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#### APPEARS IN

RD Sharma Class 11 Mathematics Textbook
Chapter 30 Derivatives
Exercise 30.4 | Q 22 | Page 39

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