Math Is Fun Forum

xXxEmZyxXx

Member

Registered: 2007-10-15

Posts: 12

Question about Euler-lagranges equation

so ive been revising my lecture note and ive found a subject which is slightly confusing me
I have the following integral 

we have the euler equation:

which gives us two equations

does anyone know how to get to these answers. i've tried to solve it but i think i've gone wrong with my differentiation