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if nth term of an AP os (2n+1) what os the sum of its first three terms

Posted by Vikram Singh Hada 7 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 7 years, 2 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

0Thank You

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