October 2018 2 24 Report
-harap pakai cara
-tidak boleh ngasal

10. Diberikan garis l : (x – 2y) + a(x + y) = 5 dan garis g :
(5y – 3x) –3a(x + y) = 12.
Tentukan nilai a agar:
a.l / / g
b.l⊥ g

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