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Question

If [ab+ca+b+c]=0 then find the value of a.{(b+c)×(a+b+c)}

A
-1
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B
0
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C
1
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D
None of these
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Solution

The correct option is B 0
a.{(b+c)×(a+b+c)} =a.{(b+c)×a+0}=a.{b×a+c×a}
=[aba]+[aca]=0

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