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Raj Aryan
Subject: Maths
, asked on 6/2/18
Solve this:
Answer
0
Aishwarya
Subject: Maths
, asked on 31/1/18
Solve this:
Answer
2
Raj Aryan
Subject: Maths
, asked on 29/1/18
Can you please explain this question by taking coff step by step.
F
i
n
d
t
h
e
c
o
e
f
f
i
c
i
e
n
t
o
f
x
4
i
n
t
h
e
e
x
p
a
n
s
i
o
n
o
f
1
+
x
-
2
x
2
7
Answer
1
Vanshika Sharma
Subject: Maths
, asked on 21/1/18
Solve this:
Q9. The co-efficient of x
k
(
0
≤
k
≤
n
) in the expansion of E = 1 +(1+ x) + (1+x)
2
+......+ (1 + x)
n
is
A
n
+
1
C
k
+
1
B
n
C
k
C
n
+
1
C
n
-
k
-
1
D
n
+
1
C
n
-
k
-
1
Q10. The last term in the binomial expansion of
2
3
-
1
2
i
s
1
3
.
9
3
log
3
8
. Then the 5
th
term from the beginning is
A
4
.
10
C
6
B
2
.
10
C
4
C
1
2
.
10
C
4
C
10
C
6
Answer
2
Priyansh
Subject: Maths
, asked on 8/1/18
Q 12 please answer as soon as possible
12
.
C
o
e
f
f
i
c
i
e
n
t
o
f
x
29
i
n
t
h
e
p
o
l
y
n
o
m
i
a
l
x
-
1
1
×
3
x
-
2
1
×
3
×
5
x
-
3
1
×
3
×
5
×
7
.
.
.
.
.
.
.
.
.
.
.
x
-
30
1
×
3
×
.
.
.
.
×
61
i
s
(
A
)
1
2
1
-
1
1
×
3
×
.
.
.
.
.
.
.
.
.
×
61
(
B
)
-
1
2
+
1
1
×
3
×
.
.
.
.
.
.
×
61
(
C
)
-
1
2
1
-
1
1
×
3
×
.
.
.
.
.
.
.
.
.
×
61
(
D
)
29
1
×
3
×
.
.
.
.
.
.
.
.
×
61
Answer
1
Kavya S
Subject: Maths
, asked on 4/1/18
Solve (9X - 1/?3x)^18 by binomial theorem
Answer
1
Goku
Subject: Maths
, asked on 31/12/17
Q. If the coefficients of 5th , 6th and 7th terms of
1
+
x
n
are in A.P., then n =
10
12
14
15
Answer
1
Soumyadeep Kar
Subject: Maths
, asked on 31/12/17
P
r
o
v
e
t
h
a
t
∑
r
=
1
m
m
+
1
r
-
1
m
r
-
1
r
C
r
m
=
m
m
-
1
Answer
2
Amitesh Kumar
Subject: Maths
, asked on 28/12/17
Please fast
7
.
I
f
1
+
x
n
=
∑
r
=
0
n
C
r
X
r
,
1
+
C
1
C
0
1
+
C
2
C
1
.
.
.
.
.
.
.
.
1
+
C
n
C
n
-
1
i
s
e
q
u
a
l
t
o
a
n
n
-
1
n
-
1
!
(
b
)
n
+
1
n
-
1
n
-
1
!
(
c
)
n
+
1
n
n
!
(
d
)
n
+
1
n
+
1
n
!
Answer
1
Amitesh Kumar
Subject: Maths
, asked on 28/12/17
Plz fast
Answer
2
Amitesh Kumar
Subject: Maths
, asked on 28/12/17
Please fast
7
.
I
f
1
+
x
n
=
∑
r
=
0
n
C
r
X
r
,
1
+
C
1
C
0
1
+
C
2
C
1
.
.
.
.
.
.
.
.
1
+
C
n
C
n
-
1
i
s
e
q
u
a
l
t
o
a
n
n
-
1
n
-
1
!
(
b
)
n
+
1
n
-
1
n
-
1
!
(
c
)
n
+
1
n
n
!
(
d
)
n
+
1
n
+
1
n
!
Answer
1
Amitesh Kumar
Subject: Maths
, asked on 28/12/17
Plz fast
Q). The expansion
x
+
x
3
-
1
1
/
2
5
+
x
-
x
3
-
1
1
/
2
5
is a polynomial of degree
(a) 5
(b) 6
(c) 7
(d) 8
Answer
1
Kshitiz Anand
Subject: Maths
, asked on 27/12/17
Qno 12
Q12. Coefficient of x
29
in the polynomial
x
-
1
1
×
3
x
-
2
1
×
3
×
5
x
-
3
1
×
3
×
5
×
7
.
.
.
.
.
.
.
30
1
×
3
×
.
.
.
.
.
×
61
is
A
1
2
1
-
1
1
×
3
×
.
.
.
.
.
×
61
B
1
2
+
1
1
×
3
×
.
.
.
.
.
×
61
C
-
1
2
1
-
1
1
×
3
×
.
.
.
.
.
×
61
D
29
1
×
3
×
.
.
.
.
.
×
61
Answer
1
Kshitiz Anand
Subject: Maths
, asked on 27/12/17
Question number 14
14
.
T
h
e
h
i
g
h
e
s
t
p
o
w
e
r
o
f
18
c
o
n
t
a
i
n
e
d
i
n
50
C
25
i
s
(
A
)
3
(
B
)
0
(
C
)
1
(
D
)
2
Answer
1
Amitesh Kumar
Subject: Maths
, asked on 27/12/17
Q.5. If
a
n
=
∑
r
=
0
n
1
C
r
n
, find the value of
∑
r
=
0
n
r
C
r
n
.
Answer
1
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What are you looking for?
Q9. The co-efficient of xk () in the expansion of E = 1 +(1+ x) + (1+x)2 +......+ (1 + x)n is
Q10. The last term in the binomial expansion of . Then the 5th term from the beginning is
Q. If the coefficients of 5th , 6th and 7th terms of are in A.P., then n =
Q). The expansion is a polynomial of degree
(a) 5
(b) 6
(c) 7
(d) 8
Q12. Coefficient of x29 in the polynomial
is