Question

Find the indicated term of the given geometric sequence, a1=18, r=2.1, n=12

Answer 1

n'th term of a geometric sequence is given by
\(\huge a_n=a_1r^{n-1}\)

Answer 2

Would I substitute the 12 in for n, then would it equal 11 snice the n-1?

Answer 3

Since^

Answer 4

yes, power of r will be 11
so what is
a12 = 18* (2.1)^11= ?

Answer 5

i suppose you will need a calculator for 2.1^11

Answer 6

The term would equal 63049.95

Answer 7

that is correct, thats your 12th term

Answer 8

Thank you. :)

Answer 9

welcome ^_^