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c2 differentiation question need help

1.png
please can some explain what part c means
is it asking for the equation of the tangent
or whether the gradient is positive or negative


thanks in advance
Original post by bigmansouf
1.png
please can some explain what part c means
is it asking for the equation of the tangent
or whether the gradient is positive or negative


thanks in advance


Is this from the longmans edexcel book?
Reply 2
Original post by SheLikeTheMango
Is this from the longmans edexcel book?


yes it is this is part of the cd pdf files
this particular file is under the acceleration file for chapter 15 differentiation

Please can you elaborate on what the question is asking
Original post by bigmansouf
yes it is this is part of the cd pdf files
this particular file is under the acceleration file for chapter 15 differentiation

Please can you elaborate on what the question is asking


It's asking you to find the coordinates of the turning points. You need to differentiate that equation they gave you, which gives you the gradient function.

Since they ask you to find the coordinates when gradient is zero, you equate the differentiated function to zero and solve. :smile:
Reply 4
Original post by SheLikeTheMango
It's asking you to find the coordinates of the turning points. You need to differentiate that equation they gave you, which gives you the gradient function.

Since they ask you to find the coordinates when gradient is zero, you equate the differentiated function to zero and solve. :smile:


thanks are you using the longman book
Original post by bigmansouf
thanks are you using the longman book


Yeah I am but for C3 and C4, it's a good book, has more questions to do once I finish the questions in the official textbook

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