That "using the formula" business always worries me. There is no substitute for know where it came from and what it actually does.I already split it apart, I understand how to do the arithmetic part the pi, 2pi and so on. But is the sum for the geometric part the a, a^2... just a? I’m using the formula.
Can you show how you used the formula to get a? Formulas can be good, but you need to think; and it doesn't make a lot of sense that the sum of a lot of positive numbers would equal the first of them, so clearly something is wrong in either the formula or your use of it.I already split it apart, I understand how to do the arithmetic part the pi, 2pi and so on. But is the sum for the geometric part the a, a^2... just a? I’m using the formula.
Yes... that equation sum for infinite terms - subject to condition r < 1.I made a mistake so I said a1=a, and r=a. S50= a/(1-a). The formula is a/(1-r). Am I using it wrong?
S50=a(1-a^n)/(1-a)Ok so it would be S50=a1(1-r^n)/(1-r). So is it S50=a(1-a^n)/1-a?