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Question

If A=(a2b+3c)
B=(2a+3b+2c)
C=(8a+13b)
Then AB and AC are collinear

A
True
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B
False
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Solution

The correct option is A True
AB=OBOA=(2a+3b+2c)(a2b+3c)=3a+5bcAC=OCOA=(8a+13b)(a2b+3c)=9a+15b3c=3(3a+5bc)=3ABAC=3ABSo,AC is parallel to ABBut they have a common point ASo AC and AB are collinear


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