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-BARSIC- [3]
4 years ago
14

The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4, or 11.25. What is the common ratio

in this sequence?
Mathematics
2 answers:
Dmitry [639]4 years ago
6 0

Answer:

0.75

Step-by-step explanation:

Elanso [62]4 years ago
5 0
We use equations for geometric sequence. We do as follows:<span>

a(n) = a(1) r^(n-1)
20 = ar^(2-1)
</span>20 = ar<span>
a = 20/r

11.25= ar^(4-1)
</span>11.25 = ar^3
<span>11.25 = (20/r)r^3
r = 0.75

Hope this answers the question. Have a nice day.</span>
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