Solve
Study
Textbooks
Join / Login
>
Class 11
>
Maths
>
Mathematics
>
Sequences and Series
>
Sequences and series
sequences and series
Browse All Exercises
Exercise 9.1
Exercise 9.2
Exercise 9.3
Exercise 9.4
Exercise 9.5
Exercise
A. G.P. consists of of an even numbers of terms . If the sum of all the terms is
$5$
times the sum of terms occupying odd places, the find its common ratio.
View solution
>
Find the sum of integers from
$1$
to
$100$
that are divisible by
$2$
or
$5$
.
View solution
>
Find the sum of all numbers between
$200$
and
$400$
which are divisible by
$7$
.
View solution
>
Let the sum of
$n,2n,3n$
terms of an A.P. be
$S_{1},S_{2}$
and
$S_{3}$
, respectively, show that
$S_{3}=3(S_{2}−S_{1})$
.
View solution
>
Find the sum of all two digit numbers which when divided by
$4$
, yields
$1$
as remainder
View solution
>
Show that the sum of
$(m+n)_{th}$
and
$(m−n)_{th}$
terms of an A.P. is equal to twice the
$m_{th}$
term.
View solution
>
The sum of three numbers in G.P. is
$56$
. If we subtract
$1,7,21$
from these numbers in that order, we obtain an arithmetic progression . Find the numbers
View solution
>
If
$f$
is a function satisfying
$f(x+y)=f(x)f(y)$
for all
$x,y$
$∈N$
such that
$f(1)=3$
and
$∑_{x=1}f(x)=120$
, find the value of
$n$
.
View solution
>
If the sum of three numbers in increasing A.P., is
$24$
and their product is
$440$
, find the numbers.
View solution
>
The sum of some terms of G.P. is
$315$
whose first term and the common ratio are
$5$
and
$2$
, respectively. Find the last term and the number of terms .
View solution
>
VIEW MORE