Question

Calcule as integrais abaixo
a) $\int\limits( { x^{3} - x^{4} } } \, dx$
b) $\int\limits ( {cos x - e^{x}) } \, dx$

Answer 1

$x^{3} - x^{4} dx =\frac{x ^{3+1} }{3+1} - \frac{x ^{4+1} }{4+1} + C = \frac{x ^{4} }{4}-\frac{x ^{5} }{5}+C$