Question

If the nth term of an AP is (2n + 1), then the sum of its first three terms is


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Answer 1

Answer:

putting n=1,2,3respectively in 2n+1

A1=2(1)+1=3

A2=2(2)+1=5

A3=2(3)+1=7

Answer 2

Answer:

A1= 2(1)+1=3

A2=2(2)+1=5

A3=2(3)+1=7