- #1
yungman
- 5,718
- 241
If ##r## is a function of ## x,y##, then
[tex]\delta r= \frac{\partial r}{\partial x}\delta x + \frac{\partial r}{\partial y}\delta y[/tex]
Means
Small change of r = ##\left[\frac{\partial r}{\partial x}\right]_{y=k}## X (Small change of x) + ##\left[\frac{\partial r}{\partial y}\right]_{x=k}## X (Small change of y)
Where ##k## is a constant.
[tex]\delta r= \frac{\partial r}{\partial x}\delta x + \frac{\partial r}{\partial y}\delta y[/tex]
Means
Small change of r = ##\left[\frac{\partial r}{\partial x}\right]_{y=k}## X (Small change of x) + ##\left[\frac{\partial r}{\partial y}\right]_{x=k}## X (Small change of y)
Where ##k## is a constant.