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没实数 a,b 満足 ab=6 ，|a+b| +|a-b|=6 ，则 a

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没实数 a,b 満足 ab=6 ，|a+b| +|a-b|=6 ，则 a2+b2=( )

A.10
B.11
C.12
D.13
E.14

参考答案:

D

ab=6, 特值法 a=2 ，b=3 満足条件， a2+b2=4+9=13 ，选 D。

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