- #36
bestchemist
- 37
- 0
voko said:In #19: ## U(x) = - \int_0^{0.5} a(x) dx - \int_{0.5}^x b(x) dx , \ 0.5 \le x < 1##.
In #30, you found what ## \int_{0.5}^x b(x) dx ## is. You still need to compute ## \int_0^{0.5} a(x) dx ## (which is the area of a triangle, as HallsofIvy remarked), and you need to mind the signs when plug all this into the formula for ##U(x)##.
okay so..
from taking the integral of a and b I got
2x^2 -2x^2+4x+k +1/2-2-k
then U = 4x+5/2
I think I did it wrong again...:(