Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
The sum of first
n
n
n
terms of an A.P is
5
n
2
+
4
n
5n^2 + 4n
5
n
2
+
4
n
, its common difference is : (a) 9 (b) 10 (c) 3 (d) -4
Browse the problem library