Datrys {l}{text{luatethefunction}f(x)=6x+2}{f(8)=1}

$$\left. \begin{array} { l } { \text { luate the function } f ( x ) = 6 x + 2 } \\ { f ( 8 ) = 1 } \end{array} \right.$$

Datrys ar gyfer f, x

$$x=-\frac{16}{47}\approx -0.340425532$$

$$f=\frac{1}{8}=0.125$$

Camau Ateb

Ystyriwch yr ail hafaliad. Rhannu’r ddwy ochr â 8.

$$f=\frac{1}{8}$$

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

$$\frac{1}{8}x=6x+2$$

Tynnu 6x o'r ddwy ochr.

$$\frac{1}{8}x-6x=2$$

Cyfuno \frac{1}{8}x a -6x i gael -\frac{47}{8}x.

$$-\frac{47}{8}x=2$$

Lluoswch y ddwy ochr â -\frac{8}{47}, cilyddol -\frac{47}{8}.

$$x=2\left(-\frac{8}{47}\right)$$

Lluosi 2 a -\frac{8}{47} i gael -\frac{16}{47}.

$$x=-\frac{16}{47}$$

Mae’r system wedi’i datrys nawr.

$$f=\frac{1}{8} x=-\frac{16}{47}$$