16.解方程式log(x-1)-log(x2-5x+4)+1=0,x=?
(A)1
(B)4
(C)10
(D)14
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統計: A(1), B(7), C(6), D(3), E(0) #797332
統計: A(1), B(7), C(6), D(3), E(0) #797332