Question

If tn = 3 + 5n then find first two terms of A.P.​

Answer 1

Given Data, nthterm of an A.P. is tn= 3 – 5n. Therefore, the first term a = t1will be obtained by substituting n = 1 in tn= 3 – 5n as follows. ⟹Sum of n terms in A.P. =n2(1−5n).