Datrys ar gyfer k
k=-2
Rhannu
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6^{-k}=36
Defnyddio rheolau esbonyddion a logarithmau i ddatrys yr hafaliad.
\log(6^{-k})=\log(36)
Cymryd logarithm dwy ochr yr hafaliad.
-k\log(6)=\log(36)
Logarithm rhif wedi’i godi i bŵer yw’r pŵer wedi’i lluosi â logarithm y rhif.
-k=\frac{\log(36)}{\log(6)}
Rhannu’r ddwy ochr â \log(6).
-k=\log_{6}\left(36\right)
Gyda’r fformiwla newid-sail \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).
k=\frac{2}{-1}
Rhannu’r ddwy ochr â -1.
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