3-d

Question: If $A\,(1\,,\,\,2,\,\,-1)$ and $B(-1,\,\,0,\,\,1)$ are given, then the co-ordinates of P which divides $AB$ externally in the ratio$1:2$, are

1) $\frac{1}{3}(1,\,4,-1)$

2) (3, 4, –3)

3) $\frac{1}{3}(3,\,4,-3)$

4) None of these

Solution:

Explanation: No Explanation

System of co-ordinates Direction cosines and direction ratios Projection

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