Question

Which is the 23rd term of the arithmetic series 5, 16, 27, ...

Answer 1

\( \color{Black}{\Rightarrow \large a_n = a_1 + (n - 1)d }\)

Replace n with 23, and d with 16 - 5 = 11

\( \color{Black}{\Rightarrow 5 + 11(23 - 1) }\)

Answer 2

\(a_1 \) is the first term, here it is 5.