diketahui vektor a=(2,-5) dan b=(1,3) jika c=2a+b dan d=a+2b,hasil cxd=...
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Pertanyaan
diketahui vektor a=(2,-5) dan b=(1,3) jika c=2a+b dan d=a+2b,hasil cxd=...
1 Jawaban
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1. Jawaban Nisasantosa
A= (2,-5)
B= (1,3)
C= 2a+b
= 2(2,-5) + (1,3)
= (4,-10) + (1,3)
= (5,-7)
D= a+2b
= (2,-5)+2(1,3)
= (2,-5)+(2,6)
= (4,1)
C x D = (5,-7) x (4,1)
= 20-7
= 13