Question

$intlimits^2_1 ( frac{2}{ x_{2} } +4x-3 x^{2} )dx, intlimits^ pi _0 {5x} , dx$

Answer 1

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 2

1) Int(1; 2) (2/x^2 + 4x - 3x^2) dx = -2/x + 2x^2 - x^3 |(1; 2) =
= -2/2 + 2*2^2 - 2^3 - (-2/1 + 2*1 - 1) = -1+8-8+2-2+1 = 0
2) Int(0, pi) 5x dx = 5x^2/2 | (0; pi) = 5pi^2/2 - 0 = 5pi^2/2

Answer 3

Виноват, во 2) пропустил синус. У Математика2011 все правильно.