ECAT Pre Engineering MCQ Test With Answer for Chapter 8 Mathematics

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

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ECAT Mathematics Chapter 8 Sequences and Series

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Question # 1

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

Question # 2

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

Question # 3

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

Question # 4

The general term of a sequence is denoted by

Question # 5

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

Question # 6

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

Question # 7

An infinite arithmetic series is always

Question # 8

A sequence whose reciprocal is an A.P is called

Question # 9

If A, G, H are the arithmetic, geometric and harmonic means between a and b respectively then A, G, H are in

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

No term of a geometric sequence can be

Question # 14

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

Question # 15

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

Question # 16

Which one represents a sequence

Question # 17

Find the next two terms of 7, 9, 12, 16,...

Question # 18

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

Question # 19

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

Question # 20

The general term of the A.P. is

Question # 21

The sixth term of the sequence 1,3,12,60....is

Question # 22

If the pth, qth, and rth terms of an A.P. are in G.P:., then the common ratio of the G.P. is

Question # 23

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

Question # 24

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

Question # 25

1 + 2 + 3 + ...... + n = ______

Question # 26

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

Question # 27

H.M. between 3 and 7 is

Question # 28

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

Question # 29

A series consisting of an unlimited number of terms is termed as an

Question # 30

Arithmetic mean between x - 3 and x + 5 is

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ECAT Mathematics Chapter 8 Important MCQ's

Sr.# Question Answer
1
Question Image
A. A.P.
B. G.P.
C. H.P.
D. None of these
2 A number A is called the arithmetic mean between a and b if a, A, b is ______
A. Arithmetic sequence
B. Geometric sequence
C. Harmonic sequence
D. Arithmetic sequence
3 The sum of n terms of a series is denoted by
A. d
B. n
C. Sn
D. an
4 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
5 If a, b, c are in A.P., then 3a, 3b, 3care in
A. A.P.
B. G.P.
C. H.P.
D. None of these
6 The sides of a right angled triangle are in A.P The ratio of sides is
A. 1:2:3
B. 3:4:5
C. 2:3:4
D. 5:8:3
7 The general term of a sequence is denoted by
A. a1
B. an
C. n
D. sn
8 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
9 No term of a harmonic sequence can be
A. 0
B. 1
C. 2
D. 3
10 The n numbers A1,A2,A3,.....Anare called an arithmetic means between a and b if a.A1,A2,A3.....An, b is ______
A. An arithmetic series
B. An arithmetic sequence
C. A geometric sequence
D. A harmonic sequence

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