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M0IITU02 - Progressions qns

# M0IITU02 - Progressions qns - Progressions a n 1 b n 1 If...

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1 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 1. If a b a b n n n n + + + + 1 1 be the A.M. of a & b, then n = (A) 1 (B) - 1 (C) 0 (D) None of these 2. The first term of an A.P. is 2 and common difference is 4 . The sum of its 40 terms will be : 3. If the sum of the roots of the equation ax 2 + bx + c = 0 be equal to the sum of the reciprocals of their squares, then bc 2 , ca 2 , ab 2 will be in : (A) A.P. (B) G.P. (C) H.P. (D) None of these 4. If a & b are two different positive real numbers, then which of the following relations is true ? 5. If the 4 th , 7 th and 10 th terms of a G.P. be a, b, c respectively, then the relation between a, b, c is : 6. If a 1/x = b 1/y = c 1/z and a, b, c are in G.P. then x, y, z will be in : (A) A.P. (B) G.P. (C) H.P. (D) None of these 7. If (p + q) th term of a G.P. be m and (p - q) th term be n, then the p th term will be : (A) 1 mn (B) mn (C) (m n) 3/2 (D) None of these 8. If p th , q th , r th and s th terms of an A.P. be in G.P., then (p - q), (q - r), (r - s) will be in : (A) G.P. (B) A.P. (C) H.P. (D) None of these 9. If 3 5 7 5 8 11 10 + + + + + + ....... ...... to n terms to terms = 7, then the value of n is : 10. The sum of the first n terms of the series 1 2 3 4 7 8 15 16 + + + + ...... is :

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M0IITU02 - Progressions qns - Progressions a n 1 b n 1 If...

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