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∵a是算術平方根等於本身的正數,b是3的平方根, ∴a=1,b=±√3 ∴當a=1,b=√3時,√(a+b)^2=√(1+√3)²;=1+√3 當a=1,b=-√3時,√(a+b)^2=√(1-√3)²;=-(1-√3)=√3-1
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