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14.If(a+b)^0.5=(a-b)^-0.5,whichofthefollowingmustbetrue?(A)b=0(B)a+b=1(C)a-b=1(D)a^2+b^2=1(E)a^2-b^2=1

题目详情
14.If (a + b)^0.5 = (a - b) ^-0.5,which of the following must be true?
(A) b = 0
(B) a + b = 1
(C) a - b = 1
(D) a^2 + b^2 = 1
(E) a^2 - b^2 = 1
▼优质解答
答案和解析
E
等式两端同时乘以(a - b) ^0.5就得到e