Questions
Download PDF
Free download in PDF Class 11 Maths Chapter 9 Sequences and Series Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER, IIT-JEE, AIEE and other competitive exams. MCQ Questions for Class 11 Maths with Answers were prepared based on the latest exam pattern. These short solved questions or quizzes are provided by Gkseries. /p>
1
a, b, c Î R+ and from an A.P. if abc = 4, then the minimum value of b is
A
(2)2/3
B
(2)1/3
C
(4)2/3
D
None of these
Answer & Explanation
2
If S
n = nP +
where Sn denotes the sum of the first ‘n’ terms of an A.P. then the common difference is
A
P + Q
B
2P + 3Q
C
2Q
D
Q
Answer & Explanation
Advertisement
3
If S
n =
, then S
n is equal to
A
2n – (n + 1)
B
n × (n + 1)/2
C
(n2 + 3n + 2)/6
D
n – 1 + (1/2n )
Answer & Explanation
4
The numbers 1, 4, 16 can be three terms (not necessarily consecutive) of
A
No A.P.
B
Only 1 or 2 G.Ps
C
Infinite number of A.Ps
D
Infinite number of G.Ps
Answer & Explanation
Answer:Infinite number of A.Ps
5
2¹ + 2² +2³ +….+2 =
A
2(2n - 1) 2
B
2(2n-1 -1) 3
C
2(2n+1 -1)
D
None of Above
Answer & Explanation
8
If A, G, H are arithmetic, geometric and harmonic means between a and b respectively, then A,G,H are
A
in G.P
B
in A.P
C
in H.P
D
Real numbers
Answer & Explanation
9
G1 ,G2 ,…,Gn are said to be n geometric means between a and b if a,G1 ,…Gn ,b is
A
a sequence
B
not a sequence
C
G.P
D
A.P
Answer & Explanation
11
If 2/3, k, 5/8 are in AP then the value of k is
A
31/24
B
31/48
C
24/31
D
48/31
Answer & Explanation
12
If Sn = n3 + n2 + n + 1, where Sn denotes the sum of the first n terms of a series and Tm = 291, then m =
Answer & Explanation
13
3, 5, 7, 9, ........ is an example of
A
Geometric Series
B
Arithmetic Series
C
Rational Exponent
D
Logarithm
Answer & Explanation
14
An arithmetic sequence has its 5th term equal to 22 and its 15th term equal to 62. Then its 100th term is equal to
Answer & Explanation
16
If 1/(b + c), 1/(c + a), 1/(a + b) are in AP then
A
a, b, c are in AP
B
a2 , b2 , c2 are in AP
C
1/1, 1/b, 1/c are in AP
D
None of these
Answer & Explanation
Answer:a2 , b2 , c2 are in AP
17
If a1 ,a2 , ..... an are positive real numbers whose product is a fixed number c, then the minimum valu of a1 + a2 + ... + an-1 + 2an is
A
n (2c)1/n
B
(n + 1)c1/n
C
2n c1/n
D
(n+1)(2c)1/n
Answer & Explanation
19
If x, y, z are in GP and ax = by = cz then the value of logb a * logb c is
A
0
B
1
C
-1
D
None of these
Answer & Explanation
20
Let a, b, c form a GP of common ratio r with 0 < r < 1. If a, 2b, 3c form an AP, then r equals
A
1/2
B
1/3
C
2/3
D
None of these
Answer & Explanation
Chapters