Question

can anyone please explain the concept of reiman sums to me?

Answer 1

Riemann sums are not to bad, by themselves. If you've got into "integration" in calculus, then it's probably easy for things to start getting mixed up.

There are a few kinds of Riemann sums. I can first tell you what they all are, vaguely. Then there's one little detail that we decide on to have a particular Riemann sum. It's like, I can explain what a dog is, with fur and all, but there are many kinds of dogs, and you need some detail to explain any one kind of dog.

So! The Riemann sum looks at a function. This is the standard, "I have this set of values, and it maps to this other set of values!" sort of thing.
So, that's something we can draw. Don't worry about the numbers involved - it's just any function.

The Riemann sum draws rectangles, in a way. You pick a place for the Riemann sum.

Answer 2

So there is where I want to find a Riemann sum, for example.

Now I break it up into smaller sections!