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If a and b are the position vectors of A and B respectively and C is a point on AB producted such that AC = 3 AB, then the position vector of C is |
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Answer» 3 a -2b Clearly , B divides AC internally in the ratio 1:2 ` thereforeb=(2a +1.c ) /(2+1)IMPLIES c=3b-2a` |
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