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The first three terms of an arithmetic sequence are 1, 10 and 19, respectively. What is the value of the 27th term?

 Apr 11, 2022
 #1
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Notice the second term is 9 more than the first....

   the 27th term will be  26 * 9    bigger than the first

       1 +  26*9 = a27  = ___________

 Apr 11, 2022
 #2
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19 - 10 = 9

10 - 1 = 9

the 27th term is 1 + 9 * (27 - 1)

which is 1 + 9*28

which is 253

the value of the 27th term is 253

 Apr 11, 2022
 #3
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+1

*** EDITED ***

 

19 - 10 = 9

10 - 1 = 9

the 27th term is 1 + 9 * (27 - 1)

which is 1 + 9*26                                   (as first Guest posted)

which is 235

the value of the 27th term is 235    

Guest Apr 11, 2022

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