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PR/SR = QR/TR
15/6 = 10/TR
TR = 60/15
TR = 4
PR = PT + TR
15 = PT + 4
PT = 15 - 4
PT = 11
Mkl=-3-3/1+2
-6/3=-2
cari gradien l dengan m
Mlm=a+3/4-1
a+3/3
a+3/3=-2
a+3=-6
a=-9
(23)pr/sr=qr/tr
15/6=10/x
x=4
pt=pr-x
15-4=11
(24) jawabanya b