Which term of the Ap: 9,8,13,18.......is 79? Please don't post invalid answer..!!

Lightsout asked Mar 3, 2022

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16 votes

Which term of the Ap: 9,8,13,18.......is 79?

Please don't post invalid answer..!!

Lightsout asked Mar 3, 2022

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25 votes

$a {}^(n) = 79$

n = ?

a = 3

79 = 3 + (n - 1) * 5

$76 = 5n - 5 \\ 81 = 5n \\ n = 16.2$

16.2 is the answer

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