Tentukan nilai x yang memenuhi persamaan 2log2logx=2log(10-2logx2)+1

²Log (²Log x) = ²Log (10-²Log x²)+ 1
                       = ²Log (10-²Log x²)+ ²Log 2
                       = ²Log (10-²Log x²)(2)
                       = ²Log (20- 2 ²Log x²)
  coret ²Log       

        ²Log x   = 20 - 2 ²Log x²
                      = 20 - ²Log x⁴
                     = ²Log 2²⁰ - ²Log x⁴
                     = ² Log 2²⁰/x⁴
 
  coret ²Log
 
               x = 2²⁰ / x⁴
               x⁵ = 2²⁰
                   = (2⁴)⁵
                   = 16⁵
 
  coret pangkat 5
 
               x = 16