Question

For the following A.P., find the first n for which t_n is negative. 122, 116, 110, ...

(Note: Find smallest n, such that t_n < 0)

Answer 1

The given A.P. is 122, 116, 110, ...

Here, a = 122, d = 116 – 122 = –6

\(\therefore\) t₂₂ is the first negative number.

\(\therefore\) The first negative term of the given A.P. is 22^nd term.