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Byju's Answer
Standard VII
Mathematics
Union
no. of elemen...
Question
no. of elements in the domain of combination of 7-x with x-5
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Q.
Two elements
(
X
)
a
n
d
(
Y
)
combine to form compound
(
A
)
a
n
d
(
B
)
. For the fixed mass of
(
X
)
, masses of
(
Y
)
combine are in
3
:
7
ratio. If in
(
A
)
,
4
g
of
(
X
)
combine with
12
g
of
(
Y
)
, then in
(
B
)
,
8
g
of
(
X
)
will combine with _______
g
of
(
Y
)
Q.
The domain of
f
(
x
)
=
√
x
+
7
x
+
5
is
Q.
The domain of
f
(
x
)
=
√
1
−
5
x
7
−
x
−
7
is
Q.
Let
f
(
x
)
=
|
k
x
+
5
|
, domain of
f
(
x
)
is
[
−
5
,
7
]
, domain of
f
(
h
(
x
)
)
is
[
−
6
,
1
]
& range of
h
(
x
)
is the same as the domain of
f
(
x
)
, then value of
k
is
Q.
Two elements
X
(at. mass 1
6
) and
Y
(at. mass
14
) combine to form compounds
A
, which combine with a fixed mass of
X
in
A
,
B
and
C
is
1
:
3
:
5
.
If
32
parts by mas of
X
combines with 84 parts by mass of
Y
in
B
, then in
C
16
parts by mass of
X
will combine with:
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