Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
tutors
pricing
login
X
ASK
Home
>>
EAMCET
>>
Mathematics
If the coefficient of $r$th and $(r+1)$th terms in the expansion of $(3+7x)^{29}$ are equal , then $r=$
\[\begin {array} {1 1} (a)\;14 & \quad (b)\;15 \\ (c)\;18 & \quad (d)\;21 \end {array}\]
jeemain
eamcet
math
2011
q26
Share
asked
Sep 20, 2013
by
meena.p
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1 Answer
(d) 21
answered
Nov 7, 2013
by
pady_1
Please
log in
or
register
to add a comment.
Related questions
If $x,y,z$ are all positive and are the $p$th, $q$th and $r$th terms of a geometric progression respectively, then the value of the determinant $\begin{vmatrix} \log x & p & 1 \\ \log z & r &1 \\ \log z & r & 1 \end{vmatrix}=$
jeemain
eamcet
math
2009
q17
asked
Oct 9, 2013
by
meena.p
1
answer
A body is projected vertically upwards from the surface of the earth with a velocity equal to $\large\frac{3}{4}$th escape velocity of earth. If 'R' is the radius of earth, the maximum height attained by the body is :
jeemain
eamcet
physics
2011
q100
asked
Nov 2, 2013
by
thanvigandhi_1
2
answers
If the coefficient of $(2r+4)^{th}$ and $(r-2)^{th}$ terms in the expansion of $(1+x)^{18} $ are equal, then $r=?$
jeemain
math
class11
ch8
binomial-theorem
properties-and-applications
easy
asked
Sep 24, 2013
by
rvidyagovindarajan_1
1
answer
When a liquid filled in two vessels A and B of equal volumes, is heated, the coefficients of apparent expansions of the liquids are found to be $ \gamma_1\: and \: \gamma_2$ respectively. If $ \alpha_1$ be the coefficient of linear expansion of A, then the coefficient of linear expansion of B will be :
jeemain
eamcet
physics
2011
q106
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
The coefficient of $r^{th}$ and $(r+1)^{th}$ terms in the expansion of $(1+x)^{20}$ are in the ratio 1 : 2 then $r=$
cbse
math
class11
ch8
binomial-theorem
additionalproblem
q21
sec-b
medium
asked
Jun 26, 2014
by
sreemathi.v
1
answer
A non-conducting body floats in a liquid at $20^{\circ}C$ with $\large\frac{2}{3}$ of its volume immersed in the liquid. When liquid temperature is increased to $100^{\circ}C,\large\frac{3}{4}$ of body's volume is immersed in the liquid . Then the coefficient of real expansion of the liquid is (neglecting the expansion of the liquid):
jeemain
eamcet
physics
2011
q100
asked
Sep 24, 2013
by
meena.p
1
answer
Trace the correct sequence of stages in the development of male gametophyte in Cycas, starting from microspore :
jeemain
eamcet
biology
2011
q26
asked
Oct 26, 2013
by
thanvigandhi_1
1
answer
Ask Question
Tag:
Math
Phy
Chem
Bio
Other
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
JEEMAIN
350+ TESTS
NEET
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
...