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30. Derivatives
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Q14 of 168 Page 30

Differentiate the following with respect to x:

Given,


f(x) =


using change of base formula for log, we can write –


logx 3 = (loge 3)/(loge x)


∴ f(x) =


⇒ f(x) =


we need to find f’(x), so differentiating both sides with respect to x –


∴ )


Using algebra of derivatives –


⇒ f’(x) =


Use the formula:



∴ f’(x) = 2( – cosec x cot x) + 8(2x loge2) – 4/(loge3) (1/x)


⇒ f’(x) =


∴ f’(x) =


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Questions · 168
30. Derivatives
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