Datrys ar gyfer x
x=2
Datrys ar gyfer x (complex solution)
x=\frac{i\times 2\pi n_{1}}{\ln(3)}+2
n_{1}\in \mathrm{Z}
Graff
Rhannu
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3^{x+2}=81
Defnyddio rheolau esbonyddion a logarithmau i ddatrys yr hafaliad.
\log(3^{x+2})=\log(81)
Cymryd logarithm dwy ochr yr hafaliad.
\left(x+2\right)\log(3)=\log(81)
Logarithm rhif wedi’i godi i bŵer yw’r pŵer wedi’i lluosi â logarithm y rhif.
x+2=\frac{\log(81)}{\log(3)}
Rhannu’r ddwy ochr â \log(3).
x+2=\log_{3}\left(81\right)
Gyda’r fformiwla newid-sail \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).
x=4-2
Tynnu 2 o ddwy ochr yr hafaliad.
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