ECAT Mathematics Chapter 8 online mcq test with answers for chapter 8 (Sequences and Series)

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.#	Question	Answer
1	If a, b, c are in A.P., then 3^a, 3^b, 3^care in	A. A.P. B. G.P. C. H.P. D. None of these
2		A. 12 B. 13 C. 14 D. 15
3	An infinite sequence has no	A. nth term B. Last term C. Sum D. None of these
4	An infinite arithmetic series is always	A. Convergent B. Oscillatory C. Divergent D. None of these
5	No term of a harmonic sequence can be	A. 0 B. 1 C. 2 D. 3
6	If #n = (n-5)2 + 5, then find #3 x #4.	A. 54 B. 12 C. 4 D. 9
7	The series obtained by adding the terms of a geometric sequence is called	A. Infinite series B. Arithmetic series C. Geometric series D. Harmonic series
8	The 31 term of the A.P 5,2,-1.....is	A. -82 B. 82 C. 85 D. -85
9	an -an-1,∀n∈N∧n>1 in an A.P is called	A. Common difference B. nth term C. Common ratio D. None of these
10	The consecutive terms of a progressions are 30, 24, 20. The next term of the progression is

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MCQ's Test For ECAT Mathematics Chapter 8 Sequences and Series

ECAT Mathematics Chapter 8 Sequences and Series

If three unequal numbers p, q, r are in H.P. and their squares are in A.P., then the ration p : q : r is

if a9 =19,a9=31 are the 6th and 9th term of an A.P. and d=4 is the common difference, then 18th term of the sequence is

If p, q, r and in A.P., a is G.M. between p and q and b is G.M. between q and r, then a2, q2, b2are in

Sequence also called..............

The difference of two consecutive terms of an A.P. is called ______

A sequence is a functions whose domain is a subset of the set of

an - an-1 will be common difference in an A.P if

Arithmetic mean between a and b is

If ax= by= czand a, b, c are in G.P. then x, y, z are in

The numbers of G1, G2, G3...... Gnare called n geometric means between a and b is a, G1, G2,G3, ... Gn, b are in

if a1 =3, d=7 and an =59 , then the number of terms in A.P is

The series obtained by adding the terms of a geometric sequence is called

The harmonic mean between a and b is

99th term of the series 2 + 7 + 14 + 23 + 34 + ..... is

Let Sndenote the sum of the first n terms of an A.P. If S2n= 3 Sn: Snis equal to

G is geometric mean between a and b if a, G, b is

A number A is called the arithmetic mean between a and b if a, A, b is ______

pth term of an H.P. is qr and qth term is pr then the rth term of the H.P. is

H1, H2, H3, .... Hnare called n harmonic means between a and b if a, H1, H2, H3, ... Hnb are in

The next term of the sequence 1, 2, 4, 7, 11, ..... is.

5th term of a G.P. is 2, then the product of first 9 terms is

The sum of an indicated number of terms in a sequence is called

If P, Q, R be the A.M., G.M., H.M. respectively between any two rational numbers a and b, then P - Q is

The number of divisors of 1029, 1547 and 122 are in

A,G,H are in

An infinite sequence has no

-2, 1, 4, 7,.... is ______

The sum of indicated terms of a sequence is called

The fifth term of the sequence an= 2n + 3 is ______

Which one represents a sequence

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ECAT Mathematics Chapter 8 Important MCQ's

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if a_{9 =19,a9=31 are the 6th and 9th term of an A.P. and d=4 is the common difference, then 18th term of the sequence is}

If p, q, r and in A.P., a is G.M. between p and q and b is G.M. between q and r, then a², q², b²are in

If a^x= b^y= c^zand a, b, c are in G.P. then x, y, z are in

The numbers of G₁, G₂, G₃...... G_nare called n geometric means between a and b is a, G₁, G_2,G₃, ... G_n, b are in

if a₁ =3, d=7 and a_n =59 , then the number of terms in A.P is

Let S_ndenote the sum of the first n terms of an A.P. If S_2n= 3 S_n: S_nis equal to

H₁, H₂, H₃, .... H_nare called n harmonic means between a and b if a, H₁, H₂, H₃, ... H_nb are in

The fifth term of the sequence a_n= 2n + 3 is ______