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Question

∣∣ ∣∣b+caabc+abcca+b∣∣ ∣∣=4abc

A
True
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B
False
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Solution

The correct option is A True
∣ ∣b+caabc+abcca+b∣ ∣=(b+c)[(c+a)(a+b)bc]a[b(a+b)bc]+a[bcc(a+c)]
=(b+c)[ac+a2+bc+abbc]a[ab+b2bc]+a[bcacc2]
=(b+c)[ac+a2+ab]a[ab+b2bc]+a[bcacc2]
=abc+a2b+ab2+ac2+a2c+abca2bab2+abc+abca2cac2
=4abc

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