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प्रश्न
If` vec"a" = 2hat"i" + 3hat"j" + + hat"k", vec"b" = hat"i" - 2hat"j" + hat"k" "and" vec"c" = -3hat"i" + hat"j" + 2hat"k", "find" [vec"a" vec"b" vec"c"]`
उत्तर
`[vec"a" vec"b" vec"c"] = |(2,3,1),(1, -2, 1),(-3, 1,2)| = 2(-4 -1) - 3(2 + 3) + 1 (1 -6)`
= `-30`
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