Question

What is the sum of the arithmetic series

Answer 1

Answer:

Step-by-step explanation:

If the series has a fixed gap between entities (terms).

Add the first and the last values and multiplied by the half of number of terms

For example

$\frac{n}{2} (N_{1}+ N_{n})$

2,4,6,8,10 = 5/2 (2 + 10) =30

2+4+6+8+10 =30