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If nth term of an A.P …

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If nth term of an A.P is (2n+1) what is the sum of first three terms

Posted by Sara Sharma 6 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Maniti Gupta 6 years, 10 months ago

nth term = 2n+1 1st term = 3 2nd term = 5 3rd term = 7 Sum = 3+5+7= 15

2Thank You

Dia Khurana@1608 6 years, 10 months ago

You can solve this as an = 2n + 1 Now a1 = 2 (1) + 1 =3 a1 = 3 , Similarly a2 = 2(2) + 1 = 5 a3 = 7 Now sum of first three terms Put the formula And this would be ur answer = 15 I think this is the perfect answer Hope u understand?

3Thank You

Abdul Vahid 6 years, 10 months ago

3Thank You

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