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数学
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已知数a满足a+根号a的平方+a的立方的立方根=0,求/a-1/+/a+1/的值
人气:170 ℃ 时间:2019-08-20 09:20:30
解答
³√((a+√a)^2+a^3)=0
==> (a+√a)^2+a^3=0
∵存在 √a-->a≥0
∴ (a+√a)^2≥0 且 a^3≥0,
∴ (a+√a)^2=0 且 a^3=0,
==> a=0
∴ |a-1|+|a+1|=1+1=2
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