Mathematics
Senior High
∮(x+1)sin(x^2+2x) dx
=∮(x+1)(-cos(x^2+2x)/2x+2)‘ dx
=-(x+1)cos(x^2+2x)/2x+2-∮-cos(x^2+2x)/2x+2 dx
∮-cos(x^2+2x)/2x+2 dx
=-∮cos(x^2+2x)/2x+2 dx
=-sin(x^2+2x)+c'
与式=-(x+1)cos(x^2+2x)/2x+2+sin(x^2+2x)+c
この積分あってますか?
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