Question

higher order partial derivatives

Answer 1

\[f(x,t)=x^2e^-{ct} ; f_{ttt} and f_{txx}\]

Answer 2

I got \[-c^3x^2e^{-ct}\] and \[ -2ce^{-ct}\]

Answer 3

What is e^- ?

Answer 4

Oh, e^(-ct)?

Answer 5

Your second expression is correct, but I think you forgot to apply the product rule in the first.

Answer 6

I think his first expression is correct...

Answer 7

Don't need product rule.

Answer 8

oh, my mistake. For some reason I thought c was the variable.

Answer 9

And yes, second expression looks correct.

Answer 10

f(x,t)=x^2e^(-ct)

Answer 11

that was the question

Answer 12

Ok, we figured that out. And we verified you were correct.

Answer 13

okay, so both of my answers are correct?

Answer 14

Looks like it.