vectors-m

Question: If $l\,\mathbf{a}+m\,\mathbf{b}+n\,\mathbf{c}=\mathbf{0},$ where $l,\,m,\,\,n$ are scalars and a, b, c are mutually perpendicular vectors, then

1) $l=m=n=1$

2) $l+m+n=1$

3) $l=m=n=0$

4) $l\ne 0,\,\,m\ne 0,\,\,n\ne 0$

Solution:

Explanation: No Explanation

Scalar Product Dot Product

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