Thu 28 Jul, 2005 10:42 am - Logarithmic Differentation
I need to use logarithmic differentation, writing the problem to logs before getting the derivative. (view)
Thu 28 Jul, 2005 08:59 am - [quote="engineer"]The derivative of
f(x) g(x) = f(x) g'(x) + f'(x) g(x)
You can extend this also. So if you have
a(x) b(x) c(x), you can assign f(x) as a(x) and g(x)... (view)
Thu 28 Jul, 2005 04:45 am - How do I differentiate x^2e^-x(3x+5)^3?
I came up with ln (x^2e^-x)+ln (3x+5)^3 =
2 ln (xe^-x) + 3 ln (3x+5) =
2 (1/x e^-x) + 3 (5/3x+5) =
2/(xe^-x) + 15/(3x+5)
Am I off track?... (view)
Tue 26 Jul, 2005 06:40 am - Integrals
Thanks guys. I tried the problem again based on your info and got (the algebra way was too complicated for me):
5 ln(lnx^2) * 2 ln x = 5/ln x^2 *2/x = 10/ x+ lnx
or is it... (view)
Mon 25 Jul, 2005 07:14 pm - Chain rule
Ok, so I looked up the chain rule. It says if r(x)=(mnp)(x)=m(n(p(x)) then r'(x)=m'(n(p(x))*n'(p(x)*p'(x).
Does this translate to: ln(lnx^2)^5 = ln(ln x^2)^5 *... (view)
