Question

Find the 23 rd term of an AP whose first two terms are -2 and 5.​

Answer 1

Given :-

-2 and 5 are the first 2 terms of an AP

To find :-

23rd term of an ap

$a_{23} = a + (n - 1)d \\ \\ = (- 2) + (23 - 1)7 \\ \\ =( - 2) + 22 \times 7 \\ \\ = - 2 + 154 \\ \\ = 152$