Differentiation
Two questions, needing solutions:
1.Use the differentiation of the derivative to find df/dx when f(x)=1/x . (answer is -1/x^2, but can't see how that is achieved)
2.find the rate of change of the function y(x)=x/x+3 by considering the interval x=3 to x=3+h. (answer: 1/12 , don't understand how that was achieved)
1.Use the differentiation of the derivative to find df/dx when f(x)=1/x . (answer is -1/x^2, but can't see how that is achieved)
2.find the rate of change of the function y(x)=x/x+3 by considering the interval x=3 to x=3+h. (answer: 1/12 , don't understand how that was achieved)
Let's first do part 1. Can you rewrite f(x)=1/x in terms of x and a power. It might become easier to see what to do then.
For part 2, can you differentiate from first principles?
For part 2, can you differentiate from first principles?
Original post by Sinnoh
Moved to Maths. Please use the right subject forum. 
This is an Alevel Maths problem
Original post by y.u.mad.bro?
Let's first do part 1. Can you rewrite f(x)=1/x in terms of x and a power. It might become easier to see what to do then.
For part 2, can you differentiate from first principles?
For part 2, can you differentiate from first principles?
Thank you, used first principles and found the answers
Original post by EBris.
Thank you, used first principles and found the answers
First principles are amazing...allowed Newton to unlock the cosmos.
Original post by EBris.
Thank you, used first principles and found the answers
That's great. Did you manage to do part 1?
Original post by EBris.
This is an Alevel Maths problem
It sure is, but that's not what the A-level forum is for, it is what the individual subject help forum is for.
The subject help forums aren't separated into different levels because an A-level student can still help out a GCSE student, someone doing their phD can still help someone out on an A-level question.
(edited 5 years ago)
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