Question

the nth term of an ap is 1/3(2n+1) then find the value of its 19th term

Answer 1

$a_n = \dfrac{1}{3} (2n + 1)$

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Find 19th term:

$a_{19} = \dfrac{1}{3} (2(19) + 1) = 13$

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Answer: 19th term = 13