15. Exercises.

3.1) A functional

where V  is a normed linear space, is linear if

and

Which of the following functionals on C1[a,b] are linear?

a)

 

b)

c)

d)

3.2) Show that the Euler equation for the functional

has the form

3.3) Find an extremal to

3.4) Find the extremals to

3.5) Find the extremals to

a)

b)

3.6) Show that the Euler equation for the surface area functional

is

3.7) Find an extremal to

 

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