Question

Given the sequence: 125,25 5....write the rule an using geometric sequence formula

Answer 1

Answer: A(n)=125*(0.2)^(n-1)

Explanation:

The geometric sequence formula is An=A1*r^(n-1)

r in this sequence is 1/5 or 0.2.

so we get

`A(n)=125*0.2 ^(n-1)`