Jika xlogw=1/2 dan xylogw=2/5, maka nilai ylogw adalah…

^x log w = 1/2
^w log x = 2/1 = 2
^xy log w = 5/2
^w log xy = 2/5
^w log x + ^w log y = 2/5
2 + ^w log y = 2/5
^w log y = 2/5 - 2
^w log y = 2/5 - 10/5
^w log y = -8/5
^y log w = -5/8