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Q.

If vectors a,b,c satisfy the condition |ac|=|bc|

then (ba)ca+b2 is equal to

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a

2

b

1

c

0

d

-1

answer is A.

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Detailed Solution

(a¯b)ca+b2=bcba+b2ac+a2(a+b)

and |ac|=|bc||ac|2=|bc|2

a+b=2c

Therefore, (ba)ca+b2=0

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