My input is:
And I am using the Desmos function grapher which has an issue and the issue is that it alerts me on the third function:
You can't use 'k' as an index because it's already defined.
But 'k' suppose to be local iterative variable defined inside the sum expression only and I expect that 'k' can be redefined, reused and reassigned also somewhere else.
How do I tell it that 'k' is local or to redefine, reuse and reassign it? Is this possible to do that?