Question 38774
The {{{r}}} (ratio) is determine as taking the second number divided by the first. That is 3/1, so the ratio is 3.
a) Using the formula for the nth term of a geometric sequence, what is the 10th term?
{{{n = a*r^(n-1)}}}
{{{n = 1(3)^(9) = 19683}}}
b) Using the formula for the sum of a geometric series, what is the sum of the first 10 terms?
{{{s=((a)(1-r^(n)))/(1-r)}}}
{{{s=((1-3^(10)))/(1-3)}}}
{{{s=((1-3^(10)))/(-2)}}}
{{{s=29524}}}