If x=y=100 and increasing at the rate of 1 per second, z=200, decreasing at the rate of 2 per second. Is R decreasing or increasing and at what rate?
I don't know how to do this question because R is not defined as R(x,y,z) but rather as 1/R. What do I do with this?
Btw I still don't know how to use the math tags. I tried encasing intag but the output was [math?] without my equations.
Last edited by renjer (2006-06-07 15:25:34)
name g=g(R) a function that g(R)=1/R . Also g=f(x,y,z)=1/x+1/y+1/z
as well as
Or to be more rigorous:
you need to get R[sub]x[/sub] (
The first approach is Leibniz's approach, the second is traditional differential approach, and they get a same answer, some guy may have proved they are equavalent. Leibniz claimed using d notation may simplify algebrac manuplicion, he was great, wasn't he?
Last edited by George,Y (2006-06-07 16:35:14)