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目錄
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開始
1
梯度
2
示例
切換目錄
算術課程/數運算/梯度
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<
算術課程
|
數運算
梯度
[
編輯
|
編輯原始碼
]
梯度是指一個變數相對於另一個變數的變化率。
如果y發生變化
δ
y
=
y
−
y
1
{\displaystyle \delta y=y-y_{1}}
並且x發生變化
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
[
編輯
|
編輯原始碼
]
一條直線上有兩個點(2,3),(3,4),則該直線的梯度為
m
=
4
−
3
3
−
2
{\displaystyle m={\frac {4-3}{3-2}}}
類別
:
書籍:算術課程
華夏公益教科書