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C3 Product Rule Factorising Help

Hey I'd appreciate it if anyone could go over my working for this question. The answer in the back of the book is wrong and we've been thrown in the deep end for this topic so just a quick check would be much appreciated! :smile:

Reply 1

TenOfThem

Original post by Tremmel

Hey I'd appreciate it if anyone could go over my working for this question.

That is fine

Reply 2

user2020user

Original post by Tremmel

...

You could've gone one step further and factorised the

x

out.

y = x^2 \sqrt{2x+1} \implies \dfrac{\text{d}y}{\text{d}x} = \dfrac{x(5x+2)}{\sqrt{2x+1}}

Reply 3

brianeverit

Original post by Tremmel

your working is fine but you should get out of the habit of writing

\delta

insted of d.

\frac{\delta y}{\delta x}

is not the same thing as [tex ]\frac{\text{d}y}{\text{d}x}

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C3 Product Rule Factorising Help

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