Answer :

Here, First term = a = - 40

Common difference = d = - 15 - (-40) = 25


To find = 15th term, n = 15


Using the formula for finding nth term of an A.P.,


an = a + (n - 1) × d


an = - 40 + (15 - 1) × (25)


an = - 40 + 14 × (25) = - 40 + 350 = 310


15th term of the given AP is 310.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses