1) (график на 1-ом скриншоте)
S = int ot 3 do 5 (6x-x^2) dx = (6x^2/2 - x^3/3) | ot 3 do 5 = (3x^2-x^3/3) | ot 3 do 5 = 3*5^2-5^3/3 - (3*3^2-3^3/3) = 57 - 125/3 = 46/3
2) int ot 0 do 2 (3x^2-4x+5)dx = (3x^3/3 - 4x^2/2 + 5x) | ot 0 do 2 = (x^3 + 2x^2+5x) | ot 0 do 2 = (2^3+2*2^2+5*2 - 0) = 26
3) (график на 2-ом скриншоте)
S = int ot -2 do 2 (4-x^2) = (4x-x^3/3) | ot -2 do 2 = 4*2 - 2^3/3 - (4*(-2)- (-2)^3/3) = 16 - 16/3 = 32/2
