Question

ALGUÉM ME SOCORRE, POR FAVOR

$\int\limits^2_1 { x^3- \frac{x^2}{x^2} + 2 \, dx$

Answer 1

$\int\limits^2_1 { x^{3}- \frac{ x^{2} }{ x^{2} } +2 } \, dx \\ \\ \int\limits^2_1 { x^{3}- 1+2 } \, dx = \int\limits^2_1 { x^{3}+1 } \, dx = \frac{ x^{4} }{4} + x \\ \\ (\frac{ 2^{4} }{4} + 2)-(\frac{ 1^{4} }{4} + 1) \\ \\ (\frac{ 16 }{4} + 2)-(\frac{ 1 }{4} + 1) = 4+2-1/4-1 \\ \\ 5-1/4 = 19/4$