Question

In an ap if an =2n+5 then find the 13th term​

Answer 1

$Given \:n^{th} \:term \:of \: an \: A.P: \\ a_{n} = 2n + 5 \: ---(1)$

$If \: n = 13 , \\13^{th} \:term = a_{13} = 2\times 13 + 5 \\= 26 + 5\\= 31$

Therefore.,

$\red {a_{13} }\green {=31}$

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