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## Homework Statement

Determine whether the following are subspaces of C[-1,1]:

d) The set of functions f in C[-1,1] such that f(-1)=0 AND f(1)=0

## Homework Equations

## The Attempt at a Solution

I did the question with 'OR', but I don't think I can find the functions.

I am not sure I can use x

^{2}here ...

say f

_{2}(x)=f

_{1}(x)=x

^{2}-1 will give me 0 when x=-1 or x=1

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