> 数学 >
a2−3a+1
+b2+2b+1=0
,则a2+
1
a2
−|b|
=______.
人气:476 ℃ 时间:2019-10-02 07:53:06
解答
a2−3a+1
+b2+2b+1=0

a2−3a+1
+(b+1)2=0,
∴a2-3a+1=0,b+1=0,
∴a+
1
a
=3,
∴(a+
1
a
2=32
∴a2+
1
a2
=7;
b=-1.
a2+
1
a2
−|b|
=7-1=6.
故答案为:6.
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