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## Homework Statement

"Vary the following actions and write down the Euler-Lagrange equations of motion."

## Homework Equations

[itex]S =\int dt q[/itex]

## The Attempt at a Solution

Someone said there is a weird trick required to solve this but he couldn't remember. If you just vary normally you get [itex]\delta S=\int dt \delta q=0[/itex]

and thats not helpful. Any suggestion on how to avoid this problem?