if nth term of an A.P is (2n+1) what is the sum of first 3 terms
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Answer:
15
Step-by-step explanation:
If the nth term of the AP is 2n+1
a(first term)= 2(1)+1
=2+1
=3
second term=2(2)+1
=4+1
=5
third term=2(3)+1
=6+1
=7
∴ Sum of the three terms
first term + second term + third term
=3+5+7
=15
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