Question

O valor da integral 3somatoria1 (3x2+4x-5)dx é: a. 25 b. 40 c 10 d. 32

Answer 1

$\int\limits^3_1 ({3x^2+4x-5} )\, dx = 3* \frac{1}{3}*x^3+4* \frac{1}{2} *x^2-5x]\left \ 3} \atop {1}} \right. =x^3+2x^2-5x$

=3^3+2.3^2-5.3-1-2+5= 27+18-15-1-2+5=32

Letra D