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Shivam Gupta
Subject: Maths
, asked on 2/11/17
sir
Answer
1
Shivam Gupta
Subject: Maths
, asked on 2/11/17
sir
Answer
1
Shivam Gupta
Subject: Maths
, asked on 2/11/17
sir
Answer
1
Ruba Balu
Subject: Maths
, asked on 29/10/17
22nd. pls dont send any links
Q22) Find the value of r if the coefficients of (2r + 4)
^{ th}
and (r – 2)
^{th}
terms in the expansion of (1 + x)
^{18}
are equal.
Answer
1
Ruba Balu
Subject: Maths
, asked on 29/10/17
13th. pls dont send any links
Q13) Find the coefficient of
${x}^{7}\mathrm{in}{\left(ax+\frac{1}{bx}\right)}^{11}\mathrm{and}{x}^{-7}\mathrm{in}{\left(ax-\frac{1}{b{x}^{2}}\right)}^{11}$
and find the relation between a and b so that coefficients are equal .
Answer
2
Ruba Balu
Subject: Maths
, asked on 29/10/17
1st
Q.1) In the expansion of
${\left(1+x\right)}^{43}$
, the coefficients of
${\left(2r+1\right)}^{th}and{\left(r+2\right)}^{th}$
terms are equal. Find r.
Answer
1
Soumyadeep Kar
Subject: Maths
, asked on 26/10/17
Solve this:
Q. If the co - efficient of x
^{4}
in the expansion of
${\left(1-\mathrm{x}+2{\mathrm{x}}^{2}\right)}^{12}\mathrm{is}{}^{\mathrm{n}+2}{\mathrm{C}}_{\mathrm{r}+1}+\mathrm{r},{}^{\mathrm{n}+1}{\mathrm{C}}_{\mathrm{r}}+{}^{\mathrm{a}}{\mathrm{C}}_{\mathrm{r}}$
, then the coefficient of x
^{r}
^{ }
in the expansion of ( 1 + x )
^{a/2}
is ?
Answer
2
Soumyadeep Kar
Subject: Maths
, asked on 26/10/17
Solve this:
Q28. The number of values in set of values of
r
for which
${}^{23}{\mathrm{C}}_{\mathrm{r}}+3.{}^{23}{\mathrm{C}}_{\mathrm{r}+1}+{}^{23}{\mathrm{C}}_{\mathrm{r}+2}\ge {}^{25}{\mathrm{C}}_{15}$
is
Answer
2
Soumyadeep Kar
Subject: Maths
, asked on 26/10/17
$If{a}_{0}^{2}-{a}_{1}^{2}+{a}_{2}^{2}-{a}_{3}^{2}+...+{a}_{2n}^{2}=k{a}_{n},thenk=$
1
2
1/2
0
Answer
1
Shivam Gupta
Subject: Maths
, asked on 24/10/17
sir
Q.5. The value of
${\left(\sqrt{2}+1\right)}^{3}+{\left(\sqrt{2}-1\right)}^{3}$
is equal to
Choose one :
A. 14
B. 5
$\sqrt{2}$
C. 7
D. 10
$\sqrt{2}$
Answer
5
Shivam Gupta
Subject: Maths
, asked on 24/10/17
sir
Q.11. Number of rational terms in the expansion of
${\left(2\sqrt{x}+3{y}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$3$}\right.}\right)}^{48}$
is
Answer
1
Shivam Gupta
Subject: Maths
, asked on 24/10/17
sir
Answer
2
Shivam Gupta
Subject: Maths
, asked on 24/10/17
If coefficient of (3r + 2)th term and 2rth term in (1 + x)25 is equal then r is equal to
Answer
1
Ruba Balu
Subject: Maths
, asked on 21/10/17
Q.22.Find the value of r if the coefficients of
${\left(2r+4\right)}^{th}and{\left(r-2\right)}^{th}$
terms in the expansion of
${\left(1+x\right)}^{18}$
are equal.
Answer
2
Ruba Balu
Subject: Maths
, asked on 21/10/17
Q). Find the coefficient of
${x}^{4}$
in the expansion of
${\left(1+x+{x}^{2}+{x}^{3}\right)}^{13}$
Answer
3
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What are you looking for?

sirQ22) Find the value of r if the coefficients of (2r + 4)

^{ th}and (r – 2)^{th}terms in the expansion of (1 + x)^{18}are equal.Q13) Find the coefficient of ${x}^{7}\mathrm{in}{\left(ax+\frac{1}{bx}\right)}^{11}\mathrm{and}{x}^{-7}\mathrm{in}{\left(ax-\frac{1}{b{x}^{2}}\right)}^{11}$ and find the relation between a and b so that coefficients are equal .

Q.1) In the expansion of ${\left(1+x\right)}^{43}$, the coefficients of ${\left(2r+1\right)}^{th}and{\left(r+2\right)}^{th}$ terms are equal. Find r.

Q. If the co - efficient of x

^{4}in the expansion of ${\left(1-\mathrm{x}+2{\mathrm{x}}^{2}\right)}^{12}\mathrm{is}{}^{\mathrm{n}+2}{\mathrm{C}}_{\mathrm{r}+1}+\mathrm{r},{}^{\mathrm{n}+1}{\mathrm{C}}_{\mathrm{r}}+{}^{\mathrm{a}}{\mathrm{C}}_{\mathrm{r}}$ , then the coefficient of x^{r}^{ }in the expansion of ( 1 + x )^{a/2}is ?Q28. The number of values in set of values of

for which ${}^{23}{\mathrm{C}}_{\mathrm{r}}+3.{}^{23}{\mathrm{C}}_{\mathrm{r}+1}+{}^{23}{\mathrm{C}}_{\mathrm{r}+2}\ge {}^{25}{\mathrm{C}}_{15}$ isrQ.5. The value of ${\left(\sqrt{2}+1\right)}^{3}+{\left(\sqrt{2}-1\right)}^{3}$ is equal to

Choose one :

A. 14

B. 5$\sqrt{2}$

C. 7

D. 10$\sqrt{2}$

Q.11. Number of rational terms in the expansion of ${\left(2\sqrt{x}+3{y}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$3$}\right.}\right)}^{48}$ is