i know i have to differentiate the equation and equate it to 0 but i'm not sure

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secondary 4 | A Maths
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secondary 4 A Maths

i know i have to differentiate the equation and equate it to 0 but i'm not sure how to differentiate

pls help !!

Date Posted: 7 years ago

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Ln differentiation

Date Posted: 7 years ago

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Date Posted: 7 years ago