Mathematics
Senior High
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なぜ-2が出てくるんですか?
(ウ) 曲線 y=x2-2と曲線y=-x2+2x+2の
交点のx座標は,x2-2=-x2+2x +2 すな
わちx-x-2=0を解いて x=2, -1
よって、 求める面積をSとすると
S=S°,l-x2+2x+2-(x2-2)}dx
=-2(x²-1-2)dx
==
---2x=9
-1
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