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r1=t'2i-3j
=1'2i-3j
=1i-3j
saat t=5 s
r2=t'2i-3j
=5'2i-3j
=25i-3j
∆r=r2-r1
=25i-3j - i-3j
=24i
klau arah sya kurang tau dan maaf klau slah