1)t=x+1;dt=dx
y=∫t^(-2)dt=t^(-1)/(-1)=-1/t=-1/(x+1)=-1/(2+1)-(-1/(1+1))=1/2-1/3=1/6
2)t=x11;dt=dx
y=∫t^(-2)dt=t^(-1)/(-1)=-1/t=-1/(x-1)=-1/(0-1)-(-1/(-1-1))=1-1/2=1/2
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1)t=x+1;dt=dx
y=∫t^(-2)dt=t^(-1)/(-1)=-1/t=-1/(x+1)=-1/(2+1)-(-1/(1+1))=1/2-1/3=1/6
2)t=x11;dt=dx
y=∫t^(-2)dt=t^(-1)/(-1)=-1/t=-1/(x-1)=-1/(0-1)-(-1/(-1-1))=1-1/2=1/2