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p(x,y) ⇒ x=h ⇒ p(2h-x,y)
E(-3,6) ⇒ x=-1 ⇒ E'(2(-1)+3,6)
⇒ E'(1,6)
Soal B
p(x,y) ⇒ y=k ⇒ p'(x,2k-y)
F(7,-2) ⇒ y=3 ⇒ F'(7,2(3)+2)
⇒ F'(7,8)