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Byju's Answer
Standard IX
Mathematics
Addition of Polynomials
If fx = 3x3 -...
Question
If
f
(
x
)
=
3
x
3
−
5
x
2
+
7
,
then
f
(
−
2
)
+
f
(
2
)
is:
A
−
26
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B
26
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C
74
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D
−
74
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Solution
The correct option is
A
−
26
f
(
x
)
=
3
x
3
−
5
x
2
+
7
f
(
−
2
)
=
3
(
−
2
)
3
−
5
(
−
2
)
2
+
7
=
−
24
−
20
+
7
=
−
37
f
(
2
)
=
3
(
2
)
3
−
5
(
2
)
2
+
7
=
24
−
20
+
7
=
11
f
(
−
2
)
+
f
(
2
)
=
−
37
+
11
=
−
26
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0
Similar questions
Q.
f
(
x
)
=
x
3
+
5
x
2
+
6
x
+
7
find
f
′
(
2
)
Q.
If
f
(
x
)
=
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x
4
−
5
x
2
+
7
,
then
f
(
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−
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Q.
The graph of the function
y
=
f
(
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is symmetrical about line
x
=
2
,
then
Q.
If
f
(
x
)
=
x
2
−
5
x
+
7
, evaluate
f
(
2
)
−
f
(
−
1
)
+
f
(
1
3
)
Q.
If
f
(
x
)
=
x
3
+
x
2
f
′
(
1
)
+
x
f
′
′
(
2
)
+
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′
′
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(
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Then
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2
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is
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