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Find magnitude of A-2B+3C, where, A = 2h...

Find magnitude of A-2B+3C, where, `A = 2hati+3hatj, B = hati + hatj and c =hatk.`

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The correct Answer is:
A
`A -2B + 3C = (2hati+ 3hatj) - 2(hati+hatj) + 3hatk`
`= (hatj+3hatk)`
`:. |A - 2B + 3C| = sqrt((1)^2+(3)^2)`
`=sqrt(10) units.`
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