Blogging on Blogging on Integrals
f(x)= f(t)= tÂ²
You take f(t)substitutee 2x for t and derive t² and multiply that by the derivative of 2x.
F' (x)= (2x)(2)
I think that the confusing part of it is remembering that the upper limit or 2x in the previous example, is the inner function and that the outer function is f(t). Having clarity on this makes such a difference when solving for the derivative of F(x).