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densk [106]
3 years ago
6

The first term of a geometric sequence is 400 and the common ratio is 0.5. What

Mathematics
1 answer:
nevsk [136]3 years ago
6 0

Answer:

25

Step-by-step explanation:

The n th term of a geometric sequence is

a_{n} = a₁ r^{n-1}

where a₁ is the first term and r the common ratio

Here a₁ = 400 and r = 0.5 , thus

a_{5} = 400 × (0.5)^{4} = 400 × 0.0625 = 25

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