2 years ago

What is the value of the fourth term in a geometric sequence for which a1=10 and r =0.5

Mathematics

1 answer:

Lena [83]2 years ago

4 0

Answer: 1.25

Step-by-step explanation:

The explicit formula for the sequence is $a_{n}=10(0.5)^{n-1}$

Substituting in n=4,

$a_{4}=10(0.5)^{4-1}=\boxed{1.25}$

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