Consider the arithmetic series: 1 + 9 + 17 + 25 + write a formula for the sum of the first n terms in this series. a) 4n2 - 3n b) 6n2 - 7n c) 8n2 - 5n

The sum of an Arithmetic Series is given as:



where,
d = Common Difference = Difference of any two consecutive terms.
So,
d = 8

a1 = First term = 1

Using the values, we get:



The above equation gives the formula for n terms of an Arithmetic Series.

So, option A is the correct answer