A) 2a ? b
B) b ? 2a
C) a ? 3b
D) b
Correct Answer: C
Solution :
If x be the position vector of B, then a divides AB in the ratio 2 : 3. \[a=\frac{2x+3(a+2b)}{2+3}\] Þ \[5\,a-3\,a-6b=2\,x\,\,\,\Rightarrow \,\,x=a-3\,b.\]You need to login to perform this action.
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