Write the nth rule for each geometric sequence.5) 7, 14, 28, 56...

CoreSOLO asked Aug 5, 2023

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CoreSOLO asked Aug 5, 2023

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19 votes

We have the next numbers

as we can see we have double of the previous number, so the rule is

$a_n=a_(n-1)\cdot2$

we need to prove the rule

$a2=7\cdot2=14$
$a3=14\cdot2=28$
$a4=28\cdot2=56$

as we can see the rule is appropriate for the geometric sequence

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