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	Let the sequence 1, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, ..... where n consecutive terms have the value n, then 1025th term is	A. 2⁹ B. 2¹⁰ C. 2¹¹ D. 2⁸
2	The general term of a sequence is denoted by	A. a₁ B. a_n C. n D. s_n
3	The sum of first twenty odd integers in A.P is	A. 400 B. 397 C. 404 D. 408
4		A. 1 B. 2 C. 3/2 D. 5/2
5	G is geometric mean between a and b if a, G, b is	A. A.P. B. G.P. C. H.P. D. None of these
6	The nth term of an A.P is (3n+5) Its 75th term is	A. 26 B. 7 C. 21 D. Cannot be determined
7	If A is such that a,A,B are in A.P then A is called	A. A.M B. Common ratio C. Common difference D. None of these
8	1/2,1/3,1/4,1/5.........is	A. a geometric sec B. an arithmetric series C. finite sequence D. an infinite sequece
9	Write the first four terms of the sequence if a_n= (-1)ⁿn²	A. -1, 4, -9, 16 B. 1, -4, 9, 16 C. 1, 4, 9, 16 D. None of these
10		A. 1, 1/2, 0 B. 1, 2, 1 C. 1, 2, 3 D. 1, 2, 0

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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

For an A.P common difference d

The 7th term of the A.P 7,11,15,is

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

If the domain of sequence is finite set then the sequence is called

p, q, r and s are integers. If the A.M. of the roots of x2- px + q2= 0 and G.M. of the roots of x2- rx + s2= 0 are equal, then

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

If a, b, c are in A.P., then 3a, 3b, 3care in

1/2,1/3,1/4,1/5.........is

H.M. between 3 and 7 is

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

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

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

The n numbers A1,A2,A3,.....Anare called an arithmetic means between a and b if a.A1,A2,A3.....An, b is ______

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

If 5,7 and 9 are A.Ms between a and b, then a and b is equal to

If b1, b2, b3, ... are in G.P. with first term unity and common ratio r, then the minimum value of b1- b3+ b5is equal to

If a1, r are first term and the common ratio respectively then the sum of an infinite geometric series is

The seventh term of an A.P whose first term is P and common difference is q. 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

The formula an = arn-1represents

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

Arithmetic mean between x - 3 and x + 5 is

Three consecutive terms of a progression are 30, 24, 20. The next terms of the progression is

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

A number H is said to be the H.M. between a and b if a, H, b are in

The nth term of a G.P. is

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

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 x,y are two -ve distinct numbers then

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ECAT Mathematics Chapter 8 Important MCQ's

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If a, b, c are in A.P., then 3^a, 3^b, 3^care in

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

The n numbers A₁,A₂,A₃,.....A_nare called an arithmetic means between a and b if a.A₁,A₂,A₃.....A_n, b is ______

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

If b₁, b₂, b₃, ... are in G.P. with first term unity and common ratio r, then the minimum value of b₁- b₃+ b₅is equal to

If a₁, r are first term and the common ratio respectively then the sum of an infinite geometric series 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

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

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