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Kazeer [188]
2 years ago
15

Find the 9th term of the geometric sequence 5, -25, 125, ...

Mathematics
1 answer:
Ganezh [65]2 years ago
7 0

9514 1404 393

Answer:

  1,953,125

Step-by-step explanation:

The first term is a1 = 5; the common ratio is r = -25/5 = -5. The generic term is ...

  an = a1×r^(n-1)

  an = 5×(-5)^(n-1)

So, the 9th term is ...

  a9 = 5×(-5)^(9-1) = 1,953,125

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