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Write the common difference of an A. P. Whose nth term is an =3n+7

Posted by Rehan Ali 3 years, 8 months ago

CBSE > Class 10 > Mathematics

3 answers

Ayushi Gupta 3 years, 7 months ago

An = 3n + 7 Put n = 1 in eq. 1 An = 3 + 7 a = 10 Now, putting n = 2 A2 = 3(2) + 7 a2 = 13 d = a2 - a1 d = 13 - 10 d = 3

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Rahul Nawal 3 years, 8 months ago

an = 3n+7 let n = 1 3(1)+7=3+7=10 n = 2 3(2)+7=6+7=13 n =3 3(3)+7=9+7=16 n = 4 3(4)+7=12+7=19 A.P.= 10,13,16,19,........ First term = a= 10 common difference = d = 13-10=3 Answer = d = 3

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Siddh Bafna 3 years, 8 months ago

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CBSE > Class 10 > Mathematics