differentiation again | Revision Server | Page 1

hybrid mist Apr 25, 2023, 7:32 PM

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Question 7 please) I differentiated then I tried putting 27 in and that didn’t work, then I tried to rearrange the formula and that didn’t work.

slow cedar Apr 25, 2023, 7:37 PM

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i would work out the y co ordinate

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and do implicit ngl

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is that a AS q or A2

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infact it must be A2 because if u do the other way u have to do chain rule

hybrid mist Apr 25, 2023, 7:40 PM

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AS question

slow cedar Apr 25, 2023, 7:40 PM

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yea ngl the only ways ik how to do that is a2

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Nvm i lied

hybrid mist Apr 25, 2023, 7:44 PM

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Can u please explain ur steps

slow cedar Apr 25, 2023, 7:45 PM

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brought 64x2 to one side

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cube root 64 is 4

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cube root of x2 is x2/3

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and then diffrentiate

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and sub in x=27 into dy/dx

hybrid mist Apr 25, 2023, 7:46 PM

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Wait why did u cube root it

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Oh wait

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Nvm

slow cedar Apr 25, 2023, 7:46 PM

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y is cubed

hybrid mist Apr 25, 2023, 7:46 PM

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I’m so dumb

slow cedar Apr 25, 2023, 7:46 PM

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to get in terms of y

hybrid mist Apr 25, 2023, 7:46 PM

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Tysm

slow cedar Apr 25, 2023, 7:46 PM

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ngl if u knew year 2 maths

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thats q would be easier i wouldnt think to do it the way they expect u to do it

hybrid mist Apr 25, 2023, 7:46 PM

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I did that but for some reason differentiated y which got me the wrong answer

hybrid mist Apr 25, 2023, 7:47 PM

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slow cedar ngl if u knew year 2 maths

Imma learn some of it in the summer

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Wait I’m confused how did u get the 1/3 from the second line @slow cedar

slow cedar Apr 25, 2023, 7:55 PM

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cube root=1/3

hybrid mist Apr 25, 2023, 7:55 PM

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Oh ok cuz the blank space is 1

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Thanks again

#differentiation again