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.

   Answer (a):

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

2. What is the sum of each series?

   Hint (b):

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