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Write the common difference of an A. P. Whose nth term is an =3n+7 |
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Answer» 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 an = 3n+7let n = 13(1)+7=3+7=10n = 23(2)+7=6+7=13n =33(3)+7=9+7=16n = 4 3(4)+7=12+7=19A.P.= 10,13,16,19,........First term = a= 10 common difference = d = 13-10=3 Answer = d = 3 3 |
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