Question

)Wri te the sum of first n terms of the arithmetic sequence 1,3,5,7,

Answer 1

Answer:

sum of the first n terms

Sn=n/2(2n)=n square

Answer 2

Answer :

A1=1and A2=3

Common difference =a2-a1

= 3-2=1

Nth term

An=a1+(n-1)d

An=1+(n-1)1

An=1+n-1

An=n

Hope it will help you dear