> print(summation(b_i*x(n-i),(i, 0, 4))) > Error message is: name b_i not defined
There are two issues: `b_i` has nothing to do with `i` `x` is not a callable and `x(1)` is unrelated to `x1` -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
