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babunello [35]
2 years ago
12

Pl zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

Mathematics
1 answer:
Nady [450]2 years ago
5 0

A . B = AxBx + AyBy + AzBz

s = 7i + j

t = 4i -9j

s.t = 7.4 + 1.-9

s.t = 28 - 9 = 19

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