Question

If the sum of the first n terms of an AP is 4n -n², what is the first term (that is S.)? What
is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and nth term​

Answer 1

Step-by-step explanation:

d1 = 3. Hence, the first term is. Put n = 2, then. S2 = 4(2) – (2)2 = 8 – 4 = 4