May 2020 1 164 Report
Himpunan penyelesaian
x+y-z = 1
2x-y+2z = 9
x+3y-z = 7
adalah {(x1, y1, z1)}. Nilai (1/x1) + (1/y1) + (1/z1) = ....
A. 13/12
B. 17/21
C. ½
D. ⅓
E. ¼
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