February 2019 1 22 Report
Jika vektor a = xi – 4j + 8k tegak lurus vektor b = 2xi + 2xj – 3k, maka nilai x yang memenuhi adalah …
a. –2 atau 6
b. –3 atau 4
c. –4 atau 3
d. –6 atau 2
e. 2 atau 6




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