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目录
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1
梯度
2
示例
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算术课程/数运算/梯度
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<
算术课程
|
数运算
梯度
[
编辑
|
编辑源代码
]
梯度是指一个变量相对于另一个变量的变化率。
如果y发生变化
δ
y
=
y
−
y
1
{\displaystyle \delta y=y-y_{1}}
并且x发生变化
δ
x
=
x
−
x
1
{\displaystyle \delta x=x-x_{1}}
梯度,m
m
=
δ
y
δ
x
=
y
−
y
1
x
−
x
1
{\displaystyle m={\frac {\delta y}{\delta x}}={\frac {y-y_{1}}{x-x_{1}}}}
δ
y
=
m
δ
x
=
m
(
x
−
x
1
)
{\displaystyle \delta y=m\delta x=m(x-x_{1})}
示例
[
编辑
|
编辑源代码
]
一条直线上有两个点(2,3),(3,4),则该直线的梯度为
m
=
4
−
3
3
−
2
{\displaystyle m={\frac {4-3}{3-2}}}
类别
:
书籍:算术课程
华夏公益教科书