Sum of Consecutive Numbers help??

Question

I am almost done with the python beginner course, and everything is going well, but I have gone over this python course many times to see if I’m missing anything and I can’t find the answer to the Sum of Consecutive Numbers problem. Here’s what I have so far:
https://code.sololearn.com/cCffaK2D7hCB/?ref=app

Answer 1

print(sum(list(x)))

Answer 2

Thank you

Answer 3

I am so stupid