calculus
posted by dee .
I am having trouble with this problem also
derivative
differentiate
f(x)=(3x)^4(x+5)^3
so far I have 4(3x(x+5)^3+3(x+5)(3x)
Not quite right.
Treat it as d/dx[u(x) + v(x)]
= u dv/dx + v du/dx
u(x) = (3x)^4 v(x) = (x+5)^3
du/dx = 4(3x))^3 (using the chain rule)
dv/dx = 3(x+5)^2
[4(3x)^3*(1)(x+5)^3] + [3(x+5)^2*(3x)^4]
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