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Question

Dividing (a+b)2+(a−b)2 by a2+b2 gives:


A

1

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B

2

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C

a+b

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D

2(a+b)

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Solution

The correct option is B

2


(a+b)2+(ab)2 = (a2+b2+2ab)+(a2+b22ab)=2(a2+b2)

(a+b)2+(ab)2a2+b2=2


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