IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IB => Math => Topic started by: hyebyekadal on March 12, 2011, 04:28:41 pm

Title: A math doubt in differentiation
Post by: hyebyekadal on March 12, 2011, 04:28:41 pm

Ey Everybody..
It's been two years.. since my last post, anyway...I had a doubt..

find f'(x) from first principles:

f(x)= 2x - (1/x)

I know the ans is 2 +1/x from differention rules but what are the steps to reach that through first principles?

Thanks in advance!

Cheers

Title: Re: A math doubt in differentiation
Post by: Vin on March 13, 2011, 09:28:25 am

Long method.
http://www.intmath.com/differentiation/3-derivative-first-principles.php