Question

if nth term of an ap is (2n+1), what is the sum of its 1st 3 terms​

Answer 1

Answer:

answer is 15❤️

Answer 2

Answer:

S3=15

Step-by-step explanation:

an=(2n+1)                                 (Given)

a1=2*1+1

  =3

a2=2*2+1

   =5

a3=2*3+1

   =7

S3=3+5+7

   =15

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