Question

of nth term of an AP is (2n+1), what is the sum of its
first three terms?​

Answer 1

Answer:

put n=1 so

2n +1=3

now n=2

(2n+1)=5

now n=3

so

(2n+1)=7

Answer 2

Step-by-step explanation:

put

n=1

so

2n+1=3

now

n=2

(2n+1)=5

now

n=3

so

(2n+1)=7