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telo118 [61]
3 years ago
13

What is a formula for the nth term of the given sequence? 20,50, 125...

Mathematics
1 answer:
loris [4]3 years ago
3 0

Answer:

a(n) = 20*2.5^(n - 1)

Step-by-step explanation:

Note that 50 is 2.5 times 20, and that 125 is 2.5 times 50.  Thus the common factor is 2.5.  The formula for the nth term is

a(n) = a(1)*r^(n - 1)  => a(n) = 20*2.5^(n - 1)

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