+0  
 
0
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thank you :)

 May 11, 2021
 #1
avatar+32833 
+1

From a6 to a24   is    a6 +  18 times the common difference of the sequence   d  

   ( 189 - - 9 ) / 18 = d = 11

 from a6 to a 10 is 4 more d's

    - 9 + 4 ( 11) = a10 = 35

 May 11, 2021

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