Question
find the following derivatives:
f(x) = (2x+5)/(x^2-3)
f'(x)= (2)*(x^2 -3)-(2x+5)*2x/(x^2-3)^2
is that correct???
f(x)= (lnx)(cos x)
f'(x)= 1/x*-sinx
or do i have to use the product rule??
thank you.
f(x) = (2x+5)/(x^2-3)
f'(x)= (2)*(x^2 -3)-(2x+5)*2x/(x^2-3)^2
is that correct???
f(x)= (lnx)(cos x)
f'(x)= 1/x*-sinx
or do i have to use the product rule??
thank you.
Answers
Anonymous
the first one is correct, with the second you have to use the product rule