Posted by john on Tuesday, April 23, 2013 at 12:01pm.
the frst term of AP is 4 and the last term is 79.given that the sum of the AP is 996, find the number of terms and the commmon difference.

maths  Steve, Tuesday, April 23, 2013 at 2:44pm
a=4
Sn = n/2 (8+(n1)d) = 996
An = 4+(n1)d = 79
n = 24
d = 75/23