- #1
Karol
- 1,380
- 22
Homework Statement
Homework Equations
$$F(x)=\int_a^x f(x),~~F'(x)=f(x)$$
The Attempt at a Solution
In F'(x), x is at the end of the domain a-x, so, in my function ##~\cos(x^2)~## i also have to take the end of the domain, and it's 2x, so F'(x)=cos(4x2), but it's not enough.
The answer is F'(x)=2cos(4x2). i have to find F'(x) at x, not at 2x, so i don't know how