Asked by Dan
                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
                    Answered by
            Anonymous
            
    the first one is correct, with the second you have to use the product rule
    
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