Sum of Integers in Interval Simplified

[Tejas]

This is not a problem that I’m facing. I just want to know if I solve the question in such a way I won’t be missing out on something important.

I feel in such questions we don’t need to find the mid-term. That’s actually unnecessarily complicating the simple process. We can simply find the number of intervals and find the sum of 1^st and last term and then multiply both the values and simply divide by 2

This still results in the same answer.

[cylverixxx]

@Tejas

I feel in such questions we don’t need to find the mid-term. That’s actually unnecessarily complicating the simple process.

They’re both equivalent. I don’t see how one is faster than the other when they’re fundamentally the same.