Mathematics
Senior High

x空間の点P(2,0,1)とz平面上の曲線z=y^2を考える.点Qがの曲線上を動くとき,直線PQがxy平面と出会う点Rのえがく図形をWとする.xy平面上でWを図示せよ.

解説お願いします

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