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Nth tearm of an ap is 2n+1 and find the sum of first three terms

Posted by Balwinder Grewal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 10 months ago

If nth term of an A.P = 2n+1
then, first term of A.P = 2(1)+1
= 2+1
= 3
then, second term = 2 (2) + 1 = 4 +1 = 5
third term = 2 (3) +1 = 6+1 = 7
sum of terms = 3+5+7

sum of terms = 15

1Thank You

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