Datrys 4^x-16=0

$${ 4 }^{ x } -16=0$$

Datrys ar gyfer x

$$x=2$$

Camau gan Ddefnyddio Diffiniad Logarithm

Defnyddio rheolau esbonyddion a logarithmau i ddatrys yr hafaliad.

$$4^{x}-16=0$$

Adio 16 at ddwy ochr yr hafaliad.

$$4^{x}=16$$

Cymryd logarithm dwy ochr yr hafaliad.

$$\log(4^{x})=\log(16)$$

Logarithm rhif wedi’i godi i bŵer yw’r pŵer wedi’i lluosi â logarithm y rhif.

$$x\log(4)=\log(16)$$

Rhannu’r ddwy ochr â \log(4).

$$x=\frac{\log(16)}{\log(4)}$$

Gyda’r fformiwla newid-sail \frac{\log(a)}{\log(b)}=\log_{b}\left(a\right).

$$x=\log_{4}\left(16\right)$$

Datrys ar gyfer x (complex solution)

$$x=\frac{\pi n_{1}i}{\ln(2)}+2$$

$$n_{1}\in \mathrm{Z}$$