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	Given two numbers a and b. Let A denote the single A.M. between these and S denote the sum of n A.M.'s between them. Then S/A depends upon	A. n, a, b B. n, a C. n, b D. n
2	A Geometric Series is divergent only if	A. \|r\|>1 B. \|r\|≥1 C. \|r\|=1 D. None of these
3		A. 15/23 B. 7/15 C. 7/8 D. 15/7
4	Which one represents a sequence	A. an B. Sn C. a(n) D. {an}
5	3, 6, 12,.... is	A. A.P B. G.P. C. H.P. D. None of these
6	If 5,7 and 9 are A.Ms between a and b, then a and b is equal to	A. 2 and 12 B. 1 and 10 C. 3 and 11 D. -7 and 2
7	H₁, H₂, H₃, .... H_nare called n harmonic means between a and b if a, H₁, H₂, H₃, ... H_nb are in	A. H.P. B. G.P. C. A.P. D. None of these
8
9	No term of a harmonic sequence can be	A. 0 B. 1 C. 2 D. 3
10	Sum of n terms of a geometric series if \| r \| < 1 is

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ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 8 (Sequences and Series)

MCQ's Test For ECAT (Pre-Eng) Mathematics Chapter 8 Sequences and Series

ECAT (Pre-Eng) Mathematics Chapter 8 Sequences and Series

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

Write the first four terms of the arithmetic sequence 5, 2, -1, ... is

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

an -an-1,∀n∈N∧n>1 in an A.P is called

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

No term of a harmonic sequence can be

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

The sum of n terms of a series is denoted by

The formula an = arn-1represents

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

The nth term of a G.P. is

The 6th term of the sequence 7,9,12,16......is

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

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

If a1and r are the first term and the common ratio respectively then (n + 1)th term of the G.P. is

The formula an = a +(n-1)d for an A.P is called

If x,y are two -ve distinct numbers then

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

Sum of first n terms of an arithmetic series is

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

In an A.P,a +(n-a)d is

If a,b,c are in arithmetic progression, then 1/a,1/b.1/c are in

If a1= 3, r = 2, then the nth term of the G.P. is

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

The sum of all 2 digit number is

The three consecutive numbers a,√ab,b are in

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

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

The sum of indicated terms of a sequence is called

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ECAT Mathematics Chapter 8 Important MCQ's

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

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

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

If a₁and r are the first term and the common ratio respectively then (n + 1)th term of the G.P. is

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 a₁= 3, r = 2, then the nth term of the G.P. is

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