How do I use summation notation to write the series 2.2 + 6.6 + 11?

1 Answer
Sep 15, 2015

Answer:

#sum_(n=0)^(2) (2.2+4.4n)#

Explanation:

Perhaps the biggest problem here is to recognize the arithmetic progression of the given values:

#2.2#

#6.6 = 2.2 + 4.4#

#11 = 6.6 +4.4#
#color(white)("X") = 2.2+4.4+4.4#

So starting with a base value of #2.2# each step increases by #4.4#