Find the sum of the series

15

∑(2n-1)

n=1

∑[(2n - 1), n, 1, 15] = 225

Notice that this is just the sum of the first15 odd numbers. Because the sum of the first n is n^2, the answer is 15^2 = 225.

Jazmin may not have any idea what this notation really means.

Maybe one of you might like to explain it to her?

Of couse Jasmin could make another post on this thread and ask for an explanation if she actually wants one.

Do you want one Jasmin?