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The fifth term of an arithmetic sequence is 9 and the 32nd term is \(-840\). What is the 23rd term?

 Feb 9, 2022
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From 5th to 32nd is 27 terms   ===> 27 of the common  d

    9 + 27d  = - 840 

             d = - 30  7/9

 

 

from 5th to 23rd is 18 d

    9  + 18 ( -30 7/9) = -545

 Feb 9, 2022

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