Question

Find the 10th term of the geometric sequence 8, -24, 72, ...

Answer 1

Answer:

-157464

Step-by-step explanation:

Geometric Sequence formula = ar^n-1

In the above formula,

a = the first term

r = common differnce

n = the term which we want to know

So, the first term is 8.

We can tell that these numbers have a common difference of -3.

We need to find the 10th term.

=> 8*(-3^10-1)

=>8*-3^9

=>8*-19683

=>-157464