How do you identify #a_3# of this sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.5,?

1 Answer
Mar 14, 2017

#a_3=0.75#

Explanation:

#0.25, 0.5, 0.75, 1, 1.25, 1.5,# is arithmetic series,

as the difference between any term and its immediately preceding term is always #0.25#. For this note that

#0.5-0.25=0.75-0.5=1-0.75=1.25-1=1.5-1.25=.............=0.25#

Here the first term is denoted as #a_1#, and its value is #0.25#.

Then follow second term #a_2#, third term #a_3# and so on.

It is obvious #a_3=0.75#.