Given that first term of the AP is 7 & the common difference is 12.Find n if nth term of an AP is 295.
24
26
25
23
Given a = 7 & d = 12;
nth term = 295;
a + ( n – 1 ) d = 295
7 + ( n – 1 )12 = 295
7 + 12n – 12 = 295
12n = 300
n = 25
The sum of the first n terms of an AP is given by Sn=(3n2–4n). Find its (i) nth term, (ii) first term, and (iii) common difference.