代数示例

$f (x) = 7 - \frac{8}{7} x^{2}$

解题步骤 1

化简每一项。

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解题步骤 1.1

组合 $x^{2}$ 和 $\frac{8}{7}$ 。

$f (x) = 7 - \frac{x^{2} \cdot 8}{7}$

解题步骤 1.2

将 $8$ 移到 $x^{2}$ 的左侧。

$f (x) = 7 - \frac{8 x^{2}}{7}$

解题步骤 2

The word linear is used for a straight line. A linear function is a function of a straight line, which means that the degree of a linear function must be $0$ or $1$ . In this case, The degree of $f (x) = 7 - \frac{8 x^{2}}{7}$ is $2$ , which makes the function a nonlinear function.

$f (x) = 7 - \frac{8 x^{2}}{7}$ is not a linear function

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