已知a+b=-3,ab=2,求√b⼀a-√a⼀b的值

2025-01-06 06:38:20
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回答1:


a+b=-3<0
ab=2>0
∴a<0,b<0
∴√(b/a)+√(a/b)
=√b²/√ab+√a²/√ab
=-b/√ab-a/√ab
=-(a+b)/√ab
=-(-3)/√2
=3√2/2