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

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5 votes

Answer: 1.25

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}

What is the value of the fourth term in a geometric sequence for which a1=10 and r-example-1
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