1) ∫(5sin x+2x⁴+eˣ)dx=-5cosx+2x^5/5+e^x+C=-5cosx+0,4x^5+e^x+C
2) ∫(3eˣ-sin x+x²)dx=3e^x+cosx+x^3/3+C
3) ∫(2x³+4cos x+x⁸)dx=2x^4/4+4sinx+x^9/9+C=0,5x^4+4sinx+x^9/9+C
7x + x^2 = 0
x *(7 + x) = 0
x = 0 ;
x = - 7;
6x^2 + x - 2 = 0
D = 1 + 4*12 = 49
x1 = ( - 1 + 7)/12 = 6/12 = 1/2;
x2 = ( - 1 - 7)/12 = - 8/12 = - 2/3
Приблизительно равно 49,9