How do you find the indicated term of the geometric sequence where $a_{1} = \frac{1}{3}$ $a_1=1/3$ , r=3, n=8?

Question

8768 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-16T02:21:58

$a_{8} = 729$ $a_8=729$

Use the formula for a geometric sequence $a_{n} = a_{1} \cdot r^{n - 1}$ $a_n=a_1 *r^(n-1)$

$a_{8} = \frac{1}{3} \cdot 3^{8 - 1}$ $a_8= 1/3*3^(8-1)$

$a_{8} = 729$ $a_8=729$

How do you find the indicated term of the geometric sequence where a_1=1/3a1=13a_1=1/3, r=3, n=8?