March 2019 1 117 Report
Diketahui a dan b adalah dua vektor panjangnya |a| = 1per2 , |b| = 4per5, dan |a+b| = 1,3. Nilai |a-b| = . . .

A. 0,1
B. 0,7
C. 0,9
D. 1,0
E. 1,3

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