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In a geometric sequence, the $23$rd term is $16$ and the $24$th term is $24$.  What is the $28$th term?

 Apr 2, 2024
 #1
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r =  24 / 16 =  3/2

 

28th term  =  24 (3/2)^4  =  24 * (81 / 16)  =  (3/2) 81  =  243  / 2  =  121.5

 

cool cool cool

 Apr 3, 2024

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