Datrys 4^3-p=16

$$4 ^ { 3 - p } = 16$$

Datrys ar gyfer p

$$p=1$$

Camau gan Ddefnyddio Diffiniad Logarithm

Defnyddio rheolau esbonyddion a logarithmau i ddatrys yr hafaliad.

$$4^{-p+3}=16$$

Cymryd logarithm dwy ochr yr hafaliad.

$$\log(4^{-p+3})=\log(16)$$

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

$$\left(-p+3\right)\log(4)=\log(16)$$

Rhannu’r ddwy ochr â \log(4).

$$-p+3=\frac{\log(16)}{\log(4)}$$

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

$$-p+3=\log_{4}\left(16\right)$$

Tynnu 3 o ddwy ochr yr hafaliad.

$$-p=2-3$$

Rhannu’r ddwy ochr â -1.

$$p=-\frac{1}{-1}$$