# C4 Differentiation helpsWatch

#1
A curve is defined by the equation
Find the gradient at the point (1,3) on this curve.

Can someone please go through this question for me step by step?
0
8 years ago
#2
Do you know that d/dx f(y) = f'(y)dy/dx?

Apply this principle - use the product rule for the differentiation of 3xy.

Make dy/dx the subject.

Sub in your values of x and y.

0
#3
(Original post by *MJ*)
Do you know that d/dx f(y) = f'(y)dy/dx?

Apply this principle - use the product rule for the differentiation of 3xy.

Make dy/dx the subject.

Sub in your values of x and y.

I've got

but i'm not sure how to make dy/dx the subject with two of them?
0
#4
ahh na got it combining using brackets.. thanks
0
8 years ago
#5
(Original post by piccolo12345)
ahh na got it combining using brackets.. thanks
Just to clarify, it's called factorising and you've been doing it since GCSE
/Pedant
0
8 years ago
#6

0
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