# how to get the Values from an expression

```
#Sum of n-th roots of unity is zero.
n=10;
for i in range(1,n):
v=solve(x^i - 1,x);
sum_roots = 0;
m=i;
for j in range(0,i):
sum_roots += v[j]; # error here .. I want the values, not the expression
print ' sum of n-th roots of ' ;
print m;
print ' is ';
print sum_roots ;
```

How do i get the values from the list of expressions returned by solve? I have another Question-: How can I see all the member functions of any type,say expression..I have tried putting ? sfter the command, but that does not give all the member functions.