Question

PLEASE HELP ASAP 100 POINTS

In a geometric sequence t1 = 625, and the common ratio is r=1/5. For what value of n is tn=1/25, n=?

Answer 1

Answer:

Step-by-step explanation:

625(1/5)^(n-1) = 1/25

5^4 * (1/5)^(n-1) = 5^(-2)

(1/5)^(n-1) = 5^(-6)

(1/5)^(n-1) = (1/5)^6

n-1 = 6

n = 7

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Answer 2

Answer:

n=7

Step-by-step explanation:

n=7