Answer :

The sum to infinity of the geometric sequence is 63

How to determine the sum

The formula for determining the sum of an infinite geometric sequence is expressed as;

[tex]S = \frac{a}{1 - r}[/tex]

Given that the common ratio is less than 1.

  • The first term, a = 18. 9
  • common ration, r = -0. 3

Now, let's substitute the value into the formula

S = [tex]\frac{18. 9}{ 1 - (-0. 3)}[/tex]

simplify further

S = [tex]\frac{18. 9}{1 + 0. 3}[/tex]

S = [tex]\frac{18. 9}{1. 3}[/tex]

S = 63

Hence, the sum to infinity of the geometric sequence is 63

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