Datrys f(x)=1/2(3)^x,text{when}x=5

$$f ( x ) = \frac { 1 } { 2 } ( 3 ) ^ { x } , \text { when } x = 5$$

Datrys ar gyfer f, x

$$x=5$$

$$f = \frac{243}{10} = 24\frac{3}{10} = 24.3$$

Camau Ateb

Ystyriwch yr hafaliad cyntaf. Mewnosod y gwerthoedd sy’n hysbys i’r hafaliad.

$$f\times 5=\frac{1}{2}\times 3^{5}$$

Cyfrifo 3 i bŵer 5 a chael 243.

$$f\times 5=\frac{1}{2}\times 243$$

Lluosi \frac{1}{2} a 243 i gael \frac{243}{2}.

$$f\times 5=\frac{243}{2}$$

Rhannu’r ddwy ochr â 5.

$$f=\frac{\frac{243}{2}}{5}$$

Mynegwch \frac{\frac{243}{2}}{5} fel ffracsiwn unigol.

$$f=\frac{243}{2\times 5}$$

Lluosi 2 a 5 i gael 10.

$$f=\frac{243}{10}$$

Mae’r system wedi’i datrys nawr.

$$f=\frac{243}{10} x=5$$