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Varnika Dhiman
Subject: Maths
, asked on 20/3/18
URGENT ! Tomorrow Maths Board. Kindly provide me the solution stepwise.
If the function
f
:
R
→
R
be defined by
f
(x)=2x - 3 and g:
R
→
R
by g(x)=x
3
+5, then find the value of (fog)
-1
(x).
Answer
2
Varnika Dhiman
Subject: Maths
, asked on 20/3/18
Q. Let
f
: N
→
N be a function defined as
f
x) =
9
x
2
+ 6x— 5. Show that
f
: N
→
S,
where S is the range of
f
, is invertible. Find the inverse of
f
and hence
f
-
1
43
a
n
d
f
-
1
163
.
Answer
1
Yatharth
Subject: Maths
, asked on 20/3/18
Q43
Answer
1
Kartik Arora
Subject: Maths
, asked on 20/3/18
Q-12) Show that
f
:
N
→
N
,
i
s
g
i
v
e
n
b
y
f
x
=
x
+
1
,
i
f
x
i
s
o
d
d
,
x
-
1
,
i
f
x
i
s
e
v
e
n
i
s
b
o
t
h
o
n
e
-
o
n
e
a
n
d
o
n
t
o
.
Answer
3
Shubhrajyoti Ghosh
Subject: Maths
, asked on 19/3/18
Q. Find the interval in which the function f(x) =
x
3
-
6
x
2
+ 9x + 5 is decreasing.
Answer
2
Megha Prasadan
Subject: Maths
, asked on 18/3/18
Is this question there in our syllabus? If yes, please let me know the application is from which chapter?
Answer
1
Shubhrajyoti Ghosh
Subject: Maths
, asked on 17/3/18
No links please
Q. i) Show that the operation * defined on R - {0} by a * b = | ab | is a binary operation.
Show also that * is commutative and associative.
Answer
2
Kurian J
Subject: Maths
, asked on 16/3/18
Is misscelaneous for class 12 maths important ??
Are there any que from it in the previous year paper ?
Answer
1
Ranjit Singh
Subject: Maths
, asked on 16/3/18
Q.5
Answer
3
Prerna Varshney
Subject: Maths
, asked on 15/3/18
Q
6
.
W
h
a
t
i
s
t
h
e
r
a
n
g
e
o
f
t
h
e
f
u
n
c
t
i
o
n
f
x
=
x
-
1
x
-
1
?
Answer
1
Sofiya Parihar
Subject: Maths
, asked on 14/3/18
Q
7
.
I
f
t
h
e
o
p
e
r
a
t
i
o
n
*
o
n
Q
-
(
1
)
,
i
s
d
e
f
i
n
e
d
b
y
a
*
b
=
a
+
b
-
a
b
f
o
r
a
l
l
a
,
b
∈
Q
-
(
1
)
,
t
h
e
n
i
)
I
s
*
c
o
m
m
u
t
a
t
i
v
e
?
i
i
)
I
s
*
a
s
s
o
c
i
a
t
i
v
e
?
i
i
i
)
F
i
n
d
t
h
e
i
d
e
n
t
i
t
y
e
l
e
m
e
n
t
.
i
v
)
F
i
n
d
t
h
e
i
n
v
e
r
s
e
o
f
'
a
'
f
o
r
e
a
c
h
a
∈
Q
-
(
1
)
Answer
1
Tithi
Subject: Maths
, asked on 14/3/18
Q
5
.
L
e
t
f
:
R
→
R
b
e
d
e
f
i
n
e
d
b
y
f
(
x
)
=
x
2
-
3
x
+
4
f
o
r
a
l
l
x
∈
R
w
h
e
n
f
-
1
(
2
)
i
s
e
q
u
a
l
t
o
(
A
)
(
1
,
2
)
(
B
)
[
1
,
2
]
(
C
)
{
1
,
2
}
(
D
)
n
o
n
e
o
f
t
h
e
s
e
Answer
1
Erw Trjerth
Subject: Maths
, asked on 14/3/18
1) Let A = {a, b, c} and R be the relation defined on A as follows? R = {(a, a), (b, c), (a, b)}. Write minimum melees of ordered paired to be added to R to make R reflexive and transitive.
Answer
1
Nithyashrri Saravanan
Subject: Maths
, asked on 14/3/18
Dear experts , pls check is my solution ryt? Let f:R-)R be defined by f(x)=ax+b for all x belong to R. Find the constants a and b such that fOg =gOf=x
Answer
1
Kurian J
Subject: Maths
, asked on 13/3/18
How can I get above 90% for class 12 boards if 3 exams are left and just got 75% for the last 2 exams ??
Is it possible ??
Answer
1
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What are you looking for?
If the function f: be defined by f(x)=2x - 3 and g: by g(x)=x3+5, then find the value of (fog)-1(x).
where S is the range of , is invertible. Find the inverse of and hence .
Q. Find the interval in which the function f(x) = + 9x + 5 is decreasing.
Q. i) Show that the operation * defined on R - {0} by a * b = | ab | is a binary operation.
Show also that * is commutative and associative.
Are there any que from it in the previous year paper ?
Is it possible ??