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a b是有理數,且(a+√3)^2=b B=A^2+2√3A+3 因為B為有理數,且A^2>=0必須是有理數,2√3A也必須是有理數, 所以A必須含有√3因數,即A等於任何一個有理數乘以√3 所以絕對值最小的A=0*√3=0 此時B^A=3^0=1 因為A有許多組,B^A自然也有許多組.
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