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Grade: 11th
        three vectors from origin a,b,c.the ends of vec a is Q ,R,P respectively..if PQ=2QR then 
(a)2a+c=3b (b) a+3c=2b (c) ba+b=2b (d) a+2c=3b
6 years ago

Answers : (1)

Pushkar Aditya
71 Points
							c+PR=b     (1)

b+RQ=a    (2)


from 1 and 2
b+2PR=a

b+2(b-c)=a
b+2b-2c=a
3b-2c=a
3b=a+2c
answer (D)
						
6 years ago
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