# MTest11-1/Sequences-Series

## Quiz by Vijay Kumar

Feel free to use or edit a copy

includes Teacher and Student dashboards

### Measure skillsfrom any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet

- Q1
What is nth term in an AP

a

_{n = }a - (n-1) da

_{n = }a + (n) da

_{n = }a + (n +1) da

_{n = }a + (n-1) d15s - Q2
What is sum of five terms of an AP. if it has first term 'a' and common difference 'd'

S

_{n}= $\backslash frac\{n\}\{2\}$[ a + (5-1)d]_{ }_{ }S

_{n}= $\backslash frac\{n\}\{2\}$[ a + (n +1)d]_{ }_{ }S

_{n}= $\backslash frac\{n\}\{2\}$[ a + (n-1)d]_{ }_{ }S

_{ 5}= $\backslash frac\{5\}\{2\}$[ a + 4d]_{ }15s - Q3
What is the common difference in an AP: a , a +3d , a + 6d , a + 9d , ......

a + d

2d

3d

d

15s - Q4
What is arithmetic mean between two terms 'a' and 'b' ?

b - a

$\backslash frac\{a\backslash \; +\backslash \; b\}\{2\}$

a + b

$\backslash frac\{a\backslash \; -\backslash \; b\}\{2\}$

15s - Q5
Insert two numbers between 4 & 16, so that resulting numbers are in AP.

8, 10

6, 10

8, 12

10, 12

45s - Q6
If a , b, c are in A.P., then 3

^{ a}, 3^{ b}, 3^{ c}are in :G. P.

H. P.

Special Series

A. P.

45s - Q7
5th term of a GP is 2 , then the products of first 9 terms is :

256

128

512

1024

60s - Q8
If r < 1 in a G P, then sum to n terms is Sn =

$\backslash frac\{a\backslash \; \backslash left(\backslash \; r^\{\backslash \; n\}\backslash \; -\backslash \; 1\backslash right)\}\{r\backslash \; -\backslash \; 1\}$

$\backslash frac\{a\backslash \; \backslash left(\backslash \; 1-\backslash \; r\backslash \; ^n\backslash right)\}\{1\backslash \; -\backslash \; r\}$

$\backslash frac\{n\}\{2\}\backslash left[a\backslash \; +\backslash \; l\backslash right]$

$\backslash frac\{a\backslash \; \backslash left(\backslash \; r^\{\backslash \; n\backslash \; \}-1\backslash right)\}\{1\backslash \; -\backslash \; r\}$

20s - Q9
Sum of three numbers in an A P = -3 and their Product = 8, then numbers are

2, - 1, 4

4, 1, 2

- 4, -1, 2

- 4, 1, - 2

120s - Q10
The A. M. between two number 'a' and 'b' is :

$\backslash frac\{a\backslash \; +\backslash \; b\}\{2\}$

$\backslash frac\{a\backslash \; -\backslash \; b\}\{2\}$

$\backslash sqrt\{a\backslash \; b\}$

a + b

15s