Question

if the sum of the first n terms of an A.P is n^2 then find the 10th term

Answer 1

Answer:

a10=19

Step-by-step explanation:

sn=n^2

s1=a1

a1=1^2

a1=1

s2=a1+a2

2^2=1+a2

4-1=a2

3=a2

d=a2-a1

d=3-1

d=2

a10=a+9d

    =1+9(2)

   =1+18

    =19