If →a=2^i+^j+^k and →b=^i+5^j and →c=4^i+4^j−2^k, then the len – InterviewSolution

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1.	If →a=2^i+^j+^k and →b=^i+5^j and →c=4^i+4^j−2^k, then the length (in units.) of the projection of (3→a−2→b) in the direction of →c is
Answer» If $\to a = 2^i +^j +^k$ and $\to b =^i + 5^j$ and $\to c = 4^i + 4^j - 2^k,$ then the length (in units.) of the projection of $(3 \to a - 2 \to b)$ in the direction of $\to c$ is

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