Original post by avalerion
Times out the bracket then differentiate.
Then sub In x=-1
Then sub In x=-1
Thank you I got 4 as the answer
Original post by laila_a1
I have done this so far not sure it is it right
I have done this so far not sure it is it right
You are right until you made dy/dx = -1
You need to sub in -1
Original post by laila_a1
Thank you I got 4 as the answer
Great! I like a nice whole number
Original post by avalerion
You are right until you made dy/dx = -1
No they aren't.
Original post by laila_a1
Thank you I got 4 as the answer
That's wrong.
Original post by alow
No they aren't.
That's wrong.
That's wrong.
How?
Wait is it -44+-48 so the answer is-92 but that's a weird answer did the gradient
(edited 7 years ago)
Original post by laila_a1
How?
You expanded the bracket wrong. Look at my first post.
Check your powers when you expanded out the bracket.
Original post by laila_a1
How?
Alow has pointed out a very simple mistake you've made: that multiplying x^2 and x^11 does not give x^22. Instead the indices add.
This could perhaps make your life easier to finding an answer.
Original post by benjaminfinch
Alow has pointed out a very simple mistake you've made: that multiplying x^2 and x^11 does not give x^22. Instead the indices add.
This could perhaps make your life easier to finding an answer.
This could perhaps make your life easier to finding an answer.
Original post by laila_a1
So would this be right
Yes. Well done.
Original post by alow
Yes. Well done.
Thank you, sorry I didn't understand you before
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