首页/题库/264℃/2024-05-01 16:09:52
【高一数学】求一道对数的计算题
5^(1-log(0.2)7)=?
原式
=5/(5^log(0.2)7)
=5/(5^-log(5)7)
=5*[5^(log(5)7)]
=5*7=35