Question

Answer......pls really important....tomorrow exam

Answer 1

Answer:

ans is 2

Step-by-step explanation:

ATQ

Sn=n^2

S1=(1)^2=1=a1

S2=(2)^2=4=a1+a2

a1+a2=4

1+a2=4-1

a2=4-1=3

d=a2-a1=3-1=2

Answer 2

Answer:

Step-by-step explanation:

Sn=n^2

S1=(1)^2=1=a1

S2=(2)^2=4=a1+a2

a1+a2=4

1+a2=4-1

a2=4-1=3

d=a2-a1=3-1=2