kali安装chrome浏览器:一道高一数学简单的题目,谢谢大家!

来源:百度文库 编辑:高校问答 时间:2024/05/11 16:41:01
(x/9)^log[7]9=x/7

(x/9)^log[7]9=x/7
log[7]9*log[7]x/9=log[7]x/7
log[7]9{log[7]x-log[7]9}=log[7]x-log[7]7
log[7]9*log[7]x-log^2[7]9}=log[7]x-1
{log[7]9-1}*log[7]x=log^2[7]9-1
{log[7]9-1}*log[7]x={log[7]9-1}{log[7]9+1}
log[7]x=log[7]9+1
log[7]x=log[7]9+log[7]7=log[7]63
x=63