Question

If $A ( 1,2 , - 1 )$ and $B ( - 1,0,1 )$ are given, then the co-

ordinates of P which divides $A B$ externally in the ratio$1 : 2$, are.

• A. $\frac { 1 } { 3 } ( 1,4 , - 1 )$
• B. (3, 4, –3)
• C. $\frac { 1 } { 3 } ( 3,4 , - 3 )$
• D. None of these

Answer 1

Answer: (B)

(3, 4, –3)

Answer 2

$\left[ \frac { 2 + 1 } { 1 } , \frac { 4 - 0 } { 1 } , \frac { - 2 - 1 } { 1 } \right] = ( 3,4 , - 3 )$.