NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Nura Mohammad
Subject: Maths
, asked on 1/12/17
Ncert class 11 pg 192 question 8 . As rhe value of root 3>1 how can sn be as shown n d photo plz reply asap
Answer
2
Queens Land
Subject: Maths
, asked on 29/11/17
Pl tell the answer and reason
Q). Complete the series given below.
3, 7, 15, 35, 91, ?
A. 99
B. 255
C. 258
D. 302
E. None of these
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 25/11/17
Pls ans question no 2
Q2. If H
1
, H
2
........., H
2010
are "2010" harmonic means between a and b (
≠
a) , then value of
H
1
+
a
H
1
-
a
+
H
2010
+
b
H
2010
-
b
is equal to
(A) 2011 (B) 2012
(C) 4020 (D) 4024
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 25/11/17
if a,b,c are the pth,qth,rth term respectively of a GP, then (q-r) log a + (r-p) log b + (p-q) log c is equal to (its a numerical based question)
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 25/11/17
a,b,c are sides of a triangle and are in GP. if log a - log 2b, log 2b -log 3c and log 3c - log a are in AP then
A)angle A must be obtuse B) angle B must be obtuse
C) C=90 degree D) none of these
pls give the full solution and not only the option
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 25/11/17
if A be the AM and G be the GM between two numbers, show that the numbers are given by A + or - sqrt (A^2 - G^2).
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 25/11/17
Please ans question no 9
9
.
T
h
e
s
u
m
o
f
7
2
×
3
1
3
+
9
3
×
4
1
3
2
+
11
4
×
5
1
3
3
+
.
.
.
u
p
t
o
10
t
e
r
m
s
i
s
e
q
u
a
l
t
o
(
A
)
1
2
-
1
12
×
3
10
(
B
)
1
3
-
1
12
×
3
10
(
C
)
1
2
-
1
10
×
3
10
(
D
)
n
o
n
e
o
f
t
h
e
s
e
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 21/11/17
if a,b,c are in AP and p is the AM between a and b, and q is the AM between b and c, show that b is the AM between p and q
Answer
1
Priyanka
Subject: Maths
, asked on 18/11/17
Q. Prove that
3
1
2
×
3
1
4
×
3
1
8
.
.
.
.
=
3
Q. Let x = 1+ a+a
2
+ .... and y = 1+b+b
2
+..., where |a|
<
1 and |b|
<
1. Prove that
1
+
a
b
+
a
2
b
2
+
.
.
.
.
=
x
y
x
+
y
-
1
Answer
1
Ipsita Dash
Subject: Maths
, asked on 18/11/17
The number of terms common between the sequences 1,3,9,.....upto 90 terms and 1,5,9,..... upto 90 terms is ??
Answer
2
Ipsita Dash
Subject: Maths
, asked on 18/11/17
In a triangle the lengths of the two larger sides are 10 and 9 units respectively. If the angles are in AP , then the length of the third side.
Answer
1
Ruba Balu
Subject: Maths
, asked on 13/11/17
how did that step occur. that -1 is also root.
Answer
1
Ruba Balu
Subject: Maths
, asked on 12/11/17
20
Q20. Let a , b , c , d be in GP , then show that (a – b)
2
, (b – c)
2
, (c – d)
2
are in GP.
Answer
1
Ruba Balu
Subject: Maths
, asked on 12/11/17
18
Q18. Find the least value of n for which 1 + 3 + 3
2
+
....
...... .......
+ +
3
n – 1
> 1000 .
Answer
1
Ruba Balu
Subject: Maths
, asked on 12/11/17
16. If the
p
t
h
,
q
t
h
,
r
t
h
terms of an AP are in GP, prove that the common difference is
q
-
r
p
-
q
Answer
1
Prev
3
4
5
6
7
Next
What are you looking for?
Q). Complete the series given below.
3, 7, 15, 35, 91, ?
A. 99
B. 255
C. 258
D. 302
E. None of these
Q2. If H1 , H2 ........., H2010 are "2010" harmonic means between a and b ( a) , then value of is equal to
(A) 2011 (B) 2012
(C) 4020 (D) 4024
A)angle A must be obtuse B) angle B must be obtuse
C) C=90 degree D) none of these
pls give the full solution and not only the option
Q. Let x = 1+ a+a2 + .... and y = 1+b+b2+..., where |a| 1 and |b| 1. Prove that
Q20. Let a , b , c , d be in GP , then show that (a – b)2 , (b – c)2 , (c – d)2 are in GP.
Q18. Find the least value of n for which 1 + 3 + 32 + .... ...... ....... + + 3 n – 1 > 1000 .