- #1

- 9

- 0

## Homework Statement

ε = xe

^{-x2}

L = L

## Homework Equations

ε = ΔL/L

## The Attempt at a Solution

xe

^{-x2}= (ΔL - L)/L

∴ ΔL = Lxe

^{-x2}+ L

I really don't understand how the solution got "dx" on the first step, also the delta L. I want to understand the first step, the rest of the solution I understand. Thanks!

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