Introduction to geometric progressions - class-X
Description: introduction to geometric progressions | |
Number of Questions: 87 | |
Created by: Divya Kade | |
Tags: progressions managing money maths geometric sequences geometric progression binomial theorem, sequence and series sequences and series sequence, progression and series numbers and sequences |
The geometric sequence is also called as
A progression of the form $a, ar, ar^2$, ..... is a
The geometric progression which have infinite terms is called
If $a, b, c$ are in G.P., then
The sum $1+\dfrac { 2 }{ x } +\dfrac { 4 }{ { x }^{ 2 } } +\dfrac { 8 }{ { x }^{ 3 } } +....\left( up\ to\ \infty \right) ,x\neq 0,$ is finite if
The sum of the infinite series $1+\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{8}+......$
$S = {3^{10}} + {3^9} + \frac{{{3^9}}}{4} + \frac{{{3^7}}}{2} + \frac{{{{5.3}^6}}}{{16}} + \frac{{{3^2}}}{{16}} + \frac{{{{7.3}^4}}}{{64}} + .........$ upto infinite terms, then $\left( {\frac{{25}}{{36}}} \right)S$ equal to
If $4,64,p$ re in GP find p
In each of the following questions, a series of number is given which follow certain rules. One of the number is missing. Choose the missing number from the alternatives given below and mark it on your answer-sheet as directed. $1, \dfrac {1}{3}, \dfrac {1}{9}, \dfrac {1}{27}, \dfrac {1}{81}, \dfrac {1}{243}, $?
Find the sum of an infinite G.P : $\displaystyle 1+\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+.......$
Find the GP whose $5^{th}$ term is $48$ and $9^{th}$ term is$ 768$.
The reciprocals of all the terms of a geometric progression form a ________ progression.
In a _______ each term is found by multiplying the previous term by a constant.
A _________ is a sequence of numbers where each term in the sequence is found by multiplying the previous term with a unchanging number called the common ratio.
$10,20,40,80$ is an example of
$5 + 25 + 125 +.....$ is an example of
A ______ is the sum of the numbers in a geometric progression.
Identify the geometric series.
The sequence $6, 12, 24, 48....$ is a
$1, 3, 9, 27, 81$ is a
$4, \dfrac{8}{3}, \dfrac{16}{9}, \dfrac{32}{27}..$ is a
In a _______ each term is found by multiplying the previous term by a constant.
If a sequence of values follows a pattern of multiplying a fixed amount times each term to arrive at the following term, it is called a:
Identify the geometric progression.
A sequence of numbers such that the quotient of any two successive members of the sequence is a constant called the common ratio of the sequence is known as:
Which one of the following is not a geometric progression?
Which one of the following is a geometric progression?
Which of the following is not in the form of G.P.?
Which one of the following is a general form of geometric progression?
The number of terms in a sequence $6, 12, 24, ....1536$ represents a
Find out the general form of geometric progression.
For which sequence below can we use the formula for the general term of a geometric sequence?
An example of G.P. is
The common ratio is used in _____ progression.
Which of the following is a general form of geometric sequence?
The common ratio is calculated in
The series $a, ar, ar^2, ar^3, ar^4....$ is an
The general form of GP $a, ar, ar^2, ar^3, ar^4$ is a
$1 + 0.5 + 0.25 + 0.125....$ is an example of
How will you identify the sequence is an infinite geometric progression?
How would you find the sequence is finite geometric sequence?
Identify the finite geometric progression.
Identify the correct sequence represents a infinite geometric sequence.
If $\dfrac{a-b}{b-c}=\dfrac{a}{b}$, then $a, b, c $ are in
$2+{2}^{2}+{2}^{3}+.......+{2}^{9}=$?
How many terms are there in the G.P $3,6,12,24,.........,384$?
For a set of positive numbers, consider the following statements:
1. If each number is reduced by $2$, then the geometric mean of the set may not always exists.
2. If each number is increased by $2$, then the geometric mean of the set is increased by $2$.
Which of the above statements is/are correct?
If $a, b, c$ are in G.P., then $\dfrac {a - b}{b - c}$ is equal to
Say true or false.
The sum of infinity of $\frac{1}{7} + \frac{2}{7^2} + \frac{1}{7^3} + \frac{2}{7^4} + ......$ is:
The limit of the sum of an infinite number of terms in a geometric progression is $a/(1 - r)$ where a denotes the first term and $-1 <r<1$ denotes the common ratio. The limit of the sum of their squares is:
If $S=1+\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{8}+\dfrac{1}{16}+\dfrac{1}{32}+....\infty$.
then, the sum of the given series is $2$.
Given a sequence of $4$ members, first three of which are in G.P. and the last three are in A.P. with common difference six. If first and last terms of this sequence are equal, then the last term is:
$n$ is an integer. The largest integer $m$, such that ${n^m} + 1$ divides $1 + n + {n^2} + .....{n^{127}},$ is
Tangent at a point ${P _1}$ (other than (0, 0) on the curve $y = {x^3}$ meets the curve again at ${P _2}$. The tangent at ${P _2}$ meets the curve again at ${P _3}$ and so on. Show that the abscissae of ${P _1},{P _2},..........,{P _n}$ form a G.P. Also find the ratio $\left[ {area\,\left( {\Delta {P _1}.{P _2}.{P _3}} \right)/area\,\left( {\Delta {P _2}{P _3}{P _4}} \right)} \right].$
If $a, b, c$ are in G.P., then
Consider an infinite $G.P$. with first term $a $ and common ratio $r$, its sum is $4$ and the second term is $\dfrac {3}{4}$, then?
The first term of an infinite geometric progression is x and its sum is $5$. then
The first three of four given numbers are in G.P. and last three are in A.P. whose common difference is $6$. If the first and last numbers are same, then first will be?
The sum of $1 + \left( {1 + a} \right)x + \left( {1 + a + {a^2}} \right){x^2} + ....\infty ,\,0 < a,\,x < 1$ equals
If roots of the equations $(b-c)x^2+(c-a)x+a-b=0$, where $b\neq c$, are equal, then a, b, c are in?
If the roots of ${ x }^{ 2 }-k{ x }^{ 2 }+14x-8=0$ are in geometric progression, then $k=$
The third term of a geometric progression is $4$. The product of the first five terms is
If $a,\ b,\ c$ are in $G.P$, then
$a(b^{2}+c^{2})=c(a^{2}+b^{2})$
In a GP the sum of three numbers is $14 ,$ if $1$ is added to first two numbers and the third number is decreased by $1$, the series becomes AP, find the geometric sequence.
Which of the following is a geometric series?
Coefficient of $x^r$ in $1+(1+x)+(1+x)^2+......+ (1+x)^n$ is
The value of $p$ if $3,p,12$ are in GP
The common ratio of GP $4,8,16,32,.....$ is
If $\alpha, \beta, \gamma$ are non-constant terms in G.P and equations $\alpha { x }^{ 2 }+2\beta x+\gamma =0\quad $ and ${x}^{2}+x-1=0$ has a common root then $\left( \gamma -\alpha \right) ,\beta $ is
Write down the first five terms of the geometric progression which has first term 1 and common ratio 4.
$\displaystyle \frac{1}{c},(\frac{1}{ca})^{\dfrac{1}{2}},\frac{1}{a}$ is in
Determine the relations among x, y and z if $y^{2}=xz$
Find the sum the infinite G.P.: $\displaystyle {\frac{2}{3}\, -\, \frac{4}{9}\, +\, \frac{8}{27}\, -\, \frac{16}{21}\, +\, ........}$
Sum the series: $\displaystyle {1\, -\, \frac{1}{3}\, +\, \frac{1}{3^2}\, -\, \frac{1}{3^3}\, +\, \frac{1}{3^4}.......\infty}$
If a, b and c are in geometric progression, then $a^2$, $b^2$ and $c^2$ are in _____ progression.
The sequence $-6 + 42 - 294 + 2058$ is a
The sum of the series $10 - 5 + 2.5 - 1.25.....$ is called
When a number $x$ is subtracted from each of the numbers $8, 16$, and $40$, the resulting three numbers form a geometric progression. Find the value of $x$.
$15, 30, 60, 120, 240$ is in G.P.
Which of the following is not a G.P.?
For the infinite series $1-\cfrac { 1 }{ 2 } -\cfrac { 1 }{ 4 } +\cfrac { 1 }{ 8 } -\cfrac { 1 }{ 16 } -\cfrac { 1 }{ 32 } +\cfrac { 1 }{ 54 } -\cfrac { 1 }{ 128 } -....\quad $ let $S$ be the (limiting) sum. Then $S$ equals
What is the geometric mean of $6$ and $24$ ?
$a^x=b, b^y=c, c^z=a$
Find the value of x, y, z.
If there exists a geometric progression containing 27, 8 and 12 as three of its terms (not necessarily consecutive) then no. of progressions possible are