Whakaoti i te f(x)=5x^3+4x^2+8x+1text{when}x=2

$$f ( x ) = 5 x ^ { 3 } + 4 x ^ { 2 } + 8 x + 1 \text { when } x = 2$$

Whakaoti mō f, x

$$x=2$$

$$f = \frac{73}{2} = 36\frac{1}{2} = 36.5$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$f\times 2=5\times 2^{3}+4\times 2^{2}+8\times 2+1$$

Tātaihia te 2 mā te pū o 3, kia riro ko 8.

$$f\times 2=5\times 8+4\times 2^{2}+8\times 2+1$$

Whakareatia te 5 ki te 8, ka 40.

$$f\times 2=40+4\times 2^{2}+8\times 2+1$$

Tātaihia te 2 mā te pū o 2, kia riro ko 4.

$$f\times 2=40+4\times 4+8\times 2+1$$

Whakareatia te 4 ki te 4, ka 16.

$$f\times 2=40+16+8\times 2+1$$

Tāpirihia te 40 ki te 16, ka 56.

$$f\times 2=56+8\times 2+1$$

Whakareatia te 8 ki te 2, ka 16.

$$f\times 2=56+16+1$$

Tāpirihia te 56 ki te 16, ka 72.

$$f\times 2=72+1$$

Tāpirihia te 72 ki te 1, ka 73.

$$f\times 2=73$$

Whakawehea ngā taha e rua ki te 2.

$$f=\frac{73}{2}$$

Kua oti te pūnaha te whakatau.

$$f=\frac{73}{2} x=2$$