Question

求大神解这道题

Answer 1

全错

追答

追问

d呢

哦哦找到了

Answer 2

答案是D，选项应该是log(a)b * log(b)a = 1才对
A：log(a)MN = log(a)M + log(a)N
B：3^(x+y) = 3^x * 3^y
C：(xy)^mn = x^(mn) * y^(mn)
D：公式：log(a)b * log(b)c = log(a)c