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	The number of divisors of 1029, 1547 and 122 are in	A. A.P. B. G.P. C. H.P. D. None of these
2	The sum of n terms of a series is denoted by	A. d B. n C. S_n D. a_n
3	Find the next two terms of 7, 9, 12, 16,...	A. 18, 20 B. 19, 22 C. 20, 25 D. 21, 27
4	In following question, a number series is given with one term missing. choose the correct alternative that will same pattern and fill in the blank spaces.1 , 4, 9, 16, 25, x	A. 35 B. 36 C. 48 D. 49
5	If a₁, r are first term and the common ratio respectively then the sum of an infinite geometric series is
6	The A.M. of two numbers is 34 and G.M. is 16, the numbers are	A. 2 and 64 B. 64 and 3 C. 64 and 4 D. None of these
7	The sum of an indicated number of terms in a sequence is called	A. sequence B. progression C. Series D. Mean
8	The general term of the A.P. is	A. a₁+ (n - 1) d B. n + (a₁- 1) d C. d + (n - 1) a₁ D. None of these
9	The sum of an infinite geometric series exist if	A. \| r \| < 1 B. \| r \| > 1 C. r = 1 D. r = -1
10		A. 1 B. 2 C. 3/2 D. 5/2

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ECAT Pre Engineering MCQ Test With Answer for Chapter 8 Mathematics

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

ECAT Mathematics Chapter 8 Sequences and Series

If all members of a sequence are real numbers then it is called a

If x,y are two positive distinct numbers then

A sequence whose reciprocal is an A.P is called

H.M. between 3 and 7 is

An infinite sequence has no

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

If an= 2n -3, write the first four terms

The sum of infinite numbers of terms of an arithmetic series is

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

If a, b, c, d, e, f are in A.P.,then e-c is equal to

If a1= a2= 2, an= an-1- 1 (n > 2), then a5is

Every term of a G.P. is positive and also every term is the sum of two preceding terms. Then the common ratio of the G.P. is

If Sn is a definite number as n → ∞,then the geometric series is

The sum of the squares of three distinct real numbers, which are in G.P., is S2. if their sum isαS then

If a1, r and anare the first term, common ratio and the nth term respectively of a G. P. then an=

an -an-1,∀n∈N∧n>1 in an A.P is called

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

The5thand 13th terms of an A.P are 5 and-3 respectively The first term of the A.P is

The sum of n terms of a series is denoted by

Which one represents a sequence

The third term of the sequence an= (-1)n-1(n-7) is ______

The third term of a G.P. is the square of first term. If the second term is 8, then the 6th term is

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

Let a1, a2, a3, a4and a5be such that a1, a2, and a3are in A.P., a2, a3and a4are in G.P and a3, a4and a5are in H.P. Then, a1, a3and a5are in

How many term are there in the A.P, in which a1 = 11 , an =68, d=3

The formula an = arn-1represents

The nth term of a G.P. is

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

A function whose domain is a subset of natural numbers is called ______

How many numbers are there between 103 and 750 which are divisible by 6

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ECAT Mathematics Chapter 8 Important MCQ's

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If a_n= 2n -3, write the first four terms

If a₁= a₂= 2, a_n= a_n-1- 1 (n > 2), then a₅is

The sum of the squares of three distinct real numbers, which are in G.P., is S². if their sum isαS then

If a₁, r and a_nare the first term, common ratio and the nth term respectively of a G. P. then a_n=

The third term of the sequence a_n= (-1)^n-1(n-7) is ______

Let a₁, a₂, a₃, a₄and a₅be such that a₁, a₂, and a₃are in A.P., a₂, a₃and a₄are in G.P and a₃, a₄and a₅are in H.P. Then, a₁, a₃and a₅are in

How many term are there in the A.P, in which a₁ = 11 , a_n =68, d=3