好难啊谁来救我

好难啊！谁来救我？   screen.width*0.35) this.width=screen.width*0.40">  

参考案 详解见附图 screen.width*0.35) this.width=screen.width*0.40">

其他回   logx²_16 + log2x_64 = 0
--->lg16/lgx² + lg64/lg(2x) = 0
--->4lg2/(2lgx) + 6lg2/(lg2+lgx) = 0
--->1/lgx = -3/(lg2+lgx)
--->lg2+lgx = -3lgx
--->4lgx = lg2
--->x^4 = 2
--->x = 4次根号下2