[ch0wm4n]

Hi can someone show me where i am going wrong with these?

Find the gradient of the stated curve at the specified point.

2C) at the point

I differentiate to get:



I get on its own.



I sub the values in and get , however the answer in my book says it is .

[0range]

Nvm yh I got same as you.

[ghostwalker]

Book's wrong.

[miss katie]

I won't lie I get the same as you. Are you sure that you have the right equation and point?

[f1mad]

I agree with your answer; it is 7/28= 1/4.

Book is wrong.

[f1mad]

(Original post by 0range)
I think it should be -7y^2

What?

[0range]

(Original post by f1mad)
What?

lol nah its nothing i forgot to put a minus when doing the product rule on the -7xy^2

[ch0wm4n]

(Original post by 0range)
Nvm yh I got same as you.

(Original post by ghostwalker)
Book's wrong.

(Original post by miss katie)
I won't lie I get the same as you. Are you sure that you have the right equation and point?

Yeah, i doubled checked the question, i've spent over an hour on this question .

(Original post by f1mad)
I agree with your answer; it is 7/28= 1/4.

Book is wrong.

Ok thanks guys