The Total solution for NCERT class 6-12
Given, the kth termof the A.P. is 5k + 1.
kth term = ak = a +(k – 1)d
And,
a + (k – 1)d = 5k +1
a + kd – d =5k + 1
On comparing thecoefficient of k, we get d = 5
a – d = 1
a – 5 = 1
⇒ a =6