Consider the function .

Let be the antiderivative of with .

Then ?

I'm guessing you have to find the antiderivative, then find C and then evaluate the antiderivative with 4 as your x input.

For the antiderivative I ended up with $\displaystyle -7/2x^2 + 6/7x^7 + 2.64$

However the webwork assignment doesn't accept my final answer of 2.42

Can anyone please tell me where I messed up? Or at least just tell me whether my antiderivative was correct or not.