Hi could somebody please look through my answer to his homework assigment .

Given

show that

By using the chain-rule I get:

Therefore

Does this look okay?

Sincerely and God bless,

Fred

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- Sep 24th 2006, 02:24 PMMathman24check derivative
Hi could somebody please look through my answer to his homework assigment .

Given

show that

By using the chain-rule I get:

Therefore

Does this look okay?

Sincerely and God bless,

Fred - Sep 24th 2006, 02:37 PMtopsquark
Three things:

1. Latex is currently down.

2. Use instead of

3. Your derivatives are a bit off.

Given z = sin(x + sin(t))

(del z)/(del x) = cos(x + sin(t)) *1

not cos(x + sin(1)).

This is the only error I saw, though you kept doing it consistently. So your other partials are wrong as well.

-Dan - Sep 24th 2006, 02:52 PMMathman24
Hi

There then the partials must be

I have checked them myself, but do they look right to you now?

Sincerley Fred

p.s. my original reasoning regarding the chain rule, was that correct. I hope.? - Sep 24th 2006, 02:56 PMtopsquark