integration problem

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[molten sonnet]

I don't really see a differential.
Can you provide some context? I'm not sure if you wrote the integral correctly.

[molten sonnet]

Still no differential. And no context.

[late dagger]

sorry. my question is how the delta x effects the resoult

the diffrence is absenco of delta x in the second pic

i want to make a sum of t in interal x to zero

[molten sonnet]

What's that letter on the left?

[late dagger]

but i dont know how to put the delta x in calc

t

[molten sonnet]

So, is this what we have?
t = lpxΔx/(λΔT)

[late dagger]

yes

[molten sonnet]

Hm. And you want to integrate it with respect to what variable?

[late dagger]

x

[molten sonnet]

Well, alright.
Are l, p, Δx, λ and ΔT constants?

[late dagger]

yes

well Δx is limit to zero

is that a constant

[molten sonnet]

Alright. In that case:
∫(tdx', 0, x) = (lpΔx/(λΔT))∫(x'dx', 0, x) = lpx^2 Δx/(2λΔT)

[molten sonnet]

Then it'll just be 0.

Again, I think you are not interpreting whatever you're trying to solve correctly.

Where did this quantity come from?

[late dagger]

you mean that equation?

[molten sonnet]

Yes.

[late dagger]

where Q is ml=SΔxpl

and this t

d becomes x

[molten sonnet]

Hm. Looks familiar.
Are you sure that t and τ denote the same quantity, though?

[late dagger]

yes

[molten sonnet]

Hm... Still not sure what needs to be done, to be honest.

[late dagger]

if the delta x is limit to zero is the result of integer 0