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Rom4ik [11]
2 years ago
6

20,10,5, ... Find the 9th term.

Mathematics
1 answer:
iren [92.7K]2 years ago
6 0

Answer:

0.078125.

Step-by-step explanation:

This is a geometric sequence with first term a1 = 20 and common ratio r = 10/20 = 5/10 = 0.5.

nth term = a1 r^(n -1) so here:

9th term = 20(0.5)^(9-1)

= 20(0.5)^8

= 0.078125.

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