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Byju's Answer
Standard XI
Mathematics
Domain
Function f is...
Question
Function f is defined by
f
(
x
)
=
2
x
2
+
6
x
−
3
. Find the value of
f
(
−
2
)
.
A
-2
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B
-7
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C
12
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D
-8
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Solution
The correct option is
B
-7
f
(
x
)
=
2
x
2
+
6
x
−
3
f
(
−
2
)
=
2
(
−
2
)
2
+
6
(
−
2
)
−
3
f
(
−
2
)
=
−
7
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0
Similar questions
Q.
Function f is defined by
f
(
x
)
=
2
x
2
+
6
x
−
3
. Find the value of
f
(
−
2
)
.
Q.
Function f is defined by
f
(
x
)
=
2
x
2
+
6
x
−
3
. Find the value of
f
(
−
2
)
.
Q.
If
f
is a real valued function defined by
f
(
x
)
=
x
3
+
4
x
+
3
, then find
f
′
(
1
)
and
f
′
(
3
)
Q.
Find all points of discontinuity of
f
, where
f
is defined by
f
(
x
)
=
{
x
3
−
3
,
i
f
x
≤
2
x
2
+
1
,
i
f
x
>
2
Q.
Show that the function
f
in
A
=
R
−
{
2
3
}
defined as
f
(
x
)
=
4
x
+
3
6
x
−
4
is one-one and onto. Hence find
f
−
1
.
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