Datrys 5^-3+5^-4=k*5^-4

$$5 ^ { - 3 } + 5 ^ { - 4 } = k \times 5 ^ { - 4 }$$

Datrys ar gyfer k

$$k=6$$

Camau ar gyfer Datrys Hafaliad Llinol

Cyfrifo 5 i bŵer -3 a chael \frac{1}{125}.

$$\frac{1}{125}+5^{-4}=k\times 5^{-4}$$

Cyfrifo 5 i bŵer -4 a chael \frac{1}{625}.

$$\frac{1}{125}+\frac{1}{625}=k\times 5^{-4}$$

Adio \frac{1}{125} a \frac{1}{625} i gael \frac{6}{625}.

$$\frac{6}{625}=k\times 5^{-4}$$

Cyfrifo 5 i bŵer -4 a chael \frac{1}{625}.

$$\frac{6}{625}=k\times \frac{1}{625}$$

Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.

$$k\times \frac{1}{625}=\frac{6}{625}$$

Lluoswch y ddwy ochr â 625, cilyddol \frac{1}{625}.

$$k=\frac{6}{625}\times 625$$

Lluosi \frac{6}{625} a 625 i gael 6.

$$k=6$$