S=S1+S2
S1=∫(0-(x³+x-2))dx= -x^4/4-x^2/2+2x=
подстановка по х от 0 до 1
=-1/4-1/2+2-0=2-3/4=1 1/4=1.25
S2=∫(x³+x-2)dx=x^4/4+x^2/2-2x=
подстановка по х от 1 до 3
=81/4+9/2-6-(1/4+1/2-2)=20.25+4.5+2-0.75=26
S=1.25+26=27.25
S=S1+S2
S1=∫(0-(x³+x-2))dx= -x^4/4-x^2/2+2x=
подстановка по х от 0 до 1
=-1/4-1/2+2-0=2-3/4=1 1/4=1.25
S2=∫(x³+x-2)dx=x^4/4+x^2/2-2x=
подстановка по х от 1 до 3
=81/4+9/2-6-(1/4+1/2-2)=20.25+4.5+2-0.75=26
S=1.25+26=27.25