Question

Jordan is trying to derive the formula for the sum of a finite arithmetic series. To do this he decides to add the numbers 1 to 100. He notices that 1 + 100 = 101, 2 + 99 = 101, 3 + 98 = 101, and so on. He knows that he needs to add the first term to the last term. If n is the number of terms in the series, what should he multiply (a1 + an) by?

Answer 1

You can do this.

Answer 2

Write
1 2 ..
100 99 ..

Where will you finish the two rows?

Answer 3

@sydneiy101

Answer 4

50! cuz its the midpoint of 1 and 100

Answer 5

@pavaneinstine wait for @sydneiy101

Answer 6

thank you sooo much!!!! @pavaneinstine and @telliott99