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 a₁, r are first term and the common ratio respectively then the sum of an infinite geometric series is
2	A number H is said to be the H.M. between a and b if a, H, b are in	A. A.P. B. G. P. C. H. P. D. None of these
3	The harmonic mean between a and b is
4	The 31 term of the A.P 5,2,-1.....is	A. -82 B. 82 C. 85 D. -85
5	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
6		A. 0 B. 1 C. 2 D. 3
7		A. 2 B. -3/2 C. 1 D. 0
8	How many numbers are there between 103 and 750 which are divisible by 6	A. 125 B. 107 C. 108 D. 113
9	If a,b,c are in arithmetic progression, then 1/a,1/b.1/c are in	A. A.M B. G.M C. H.M D. G.P
10	The formula an = a +(n-1)d for an A.P is called	A. nth term of an A.P B. Sum of first n terms C. A,M between a and b D. None of the above

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

ECAT Mathematics Chapter 8 Sequences and Series

1,1/3,1/5,1/7,1/9..... is a

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

The fifth term of an A.P. Whose first term is 5 and common difference is 3,is

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

The 31 term of the A.P 5,2,-1.....is

Arithmetic mean between a and b is

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

An infinite sequence has no

What is the 26th term of the sequence, if its general term is an = (-1)n+1

The general term of a sequence is denoted by

The third term of a G.P. is 4, The product of first five terms is

The nth term of a G.P. is

A Geometric Series is divergent only if

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

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

The nth term of an A.P is (3n+5) Its 75th term is

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

If #n = (n-5)2 + 5, then find #3 x #4.

The harmonic mean between a and b is

The general term of the A.P. is

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

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

The 6th term of an arithmetic sequence whose first term is 3 and common difference in zero is

If a, b, c are in AP., a, b, c are in G.P. then A, m2b, c are in

If G is a G.M between a and b then a,G,b 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

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

Find the sum of the infinite geometric series 2 + 1 + 0.5 + ....

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

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

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Top Scorers Of ECAT Mathematics Chapter 8 Sequences and Series MCQ`s Test

ECAT Mathematics Chapter 8 Important MCQ's

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

What is the 26th term of the sequence, if its general term is a_{n = (-1)}ⁿ⁺¹

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

If a, b, c are in AP., a, b, c are in G.P. then A, m²b, c are in

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