Datrys ar gyfer n
n=\frac{2}{5}=0.4
Rhannu
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5^{5n}=25
Defnyddio rheolau esbonyddion a logarithmau i ddatrys yr hafaliad.
\log(5^{5n})=\log(25)
Cymryd logarithm dwy ochr yr hafaliad.
5n\log(5)=\log(25)
Logarithm rhif wedi’i godi i bŵer yw’r pŵer wedi’i lluosi â logarithm y rhif.
5n=\frac{\log(25)}{\log(5)}
Rhannu’r ddwy ochr â \log(5).
5n=\log_{5}\left(25\right)
Gyda’r fformiwla newid-sail \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).
n=\frac{2}{5}
Rhannu’r ddwy ochr â 5.
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