### Home > INT3 > Chapter 10 > Lesson 10.1.2 > Problem10-30

10-30.

Examine each of the series below.
Odd numbers: $1+3+5+\dots+149$
Even numbers: $2+4+6+\dots+150$

1. Write an expression for the $n$th term of each series.

$t(n)=1+2(n-1)$
$t(n)=2+2(n-1)$

2. What is the sum of each series?

Use the rectangle method or Antonio's method.
Both series have $75$ terms.