s=∫4-x-<span>x^2+3x-4 dx [x1=0;x=2]
s=</span>∫-x²+2xdx s=-x³/3+x²
s[0]=0 s[2]=8/3+4=20/3 S=|s|=20/3
1)-5*(-2)-26=10-26=-16
б)2*(-1/8)=-1/4
в)(3,8-4)²=(-0,2)²=0,04
4|3x+1|+3|3x+1|>=-7x
7|3x+1|>=-7x
|3x+1|>=-x
3x>=-1 x>=-1/3
3x+1>=-x 4x>=-1 x>=-1/4
x<-1/3
-3x-1>=-x 2x<=-1 x<=-1/2
x<=-1/2 U x>=-1/4
(-∞;-1/2] U {-1/4;∞)