# Partial DerivativesWatch

Announcements
#1
My Questions:

1) Is ((d^3)f(x,y,z))/(dxdydz) and different from ((d^3)f)/(dxdydz)

2) Does ((d^3)f)/(dxdydz) mean differentiate f with respect to z then differentiate that with respect to y then differentiate that with respect to x?

(so if I changed the order of it i.e. ((d^3)f)/(dydzdx)) then you differentiate with respect to x then x then y??????
0
#2
Anyone?
0
#3
d is delta used to donate partial derivatives I can't find delta so I have used d instead.
0
5 years ago
#4
1) They are the same
and
2) The order does not matter, you should get the same thing, and it is a useful way of chekcing that you have done it right
Hope this helps
0
5 years ago
#5
1. All we have done here is made it simpler for ourselves, rather than having to right out the function f and its arguments x,y,z we simplify notation by just using f.

2. The order does not matter as long as the function has continuous second partial derivatives.
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Brunel University London
Wed, 22 May '19
• University of Roehampton
Wed, 22 May '19
• Sheffield Hallam University
Wed, 22 May '19

### Poll

Join the discussion

#### How did your Edexcel GCSE Maths Paper 1 go?

Loved the paper - feeling positive (132)
24.86%
The paper was reasonable (234)
44.07%
Not feeling great about that exam (102)
19.21%
It was TERRIBLE (63)
11.86%