What is the 25th term in the following arithmetic sequence?
-7, -2, 3, 8, …
Solution:-
We know an = a1 + (n -1)*d ,
Where an = finding term , a1 = first term, d = second term – first term
25th = -7 + (25 – 1) * 5
25th = 113
So the value of 25th term 113