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X=-5
Cermin X=0
Jarak I ke cermin = Cermin-I
= 0-(-5) = 5
Jarak I aksen ke cermin =
Cermin+Jarak I ke cermin = 0+5 = 5
Jarak I ke I aksen =
Jarak I ke cermin + Jarak I aksen ke cermin =
5 + 5 = 10