Differentiate lnx/x^2

the answer is 1-2lnx/x^3 don't know how they kept the lnx still in after differentiating it ?

Original post by TheAlphaParticle

the answer is 1-2lnx/x^3 don't know how they kept the lnx still in after differentiating it ?

Use product rule - set u=lnx and v=x^-2 and you should get the answer.

(edited 7 years ago)

Use quotient rule.

(edited 7 years ago)

Original post by computergeek104

I think you mean the product rule - do correct me if I'm wrong.

Yes, product rule. Although if OP has any common sense, they would have got what the typo was meant to be.

Original post by BasicMistake

Use quotient rule.

For this, product would be ten times easier, and no need to simplify it all down at the end as you would have to with quotient.

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