① Find the value of f(x)+f(-x) when f(x)=3x^2+2x+5
Answers
Answered by
0
Answer:
0
Step-by-step explanation:
Answered by
0
Answer:
Explanation:
Computing the first derivative of
f
(
x
)
we get
f
'
(
x
)
=
6
x
+
2
solving the equation
f
'
(
x
)
=
0
we get
x
=
−
1
3
since
f
'
'
(
x
)
=
6
>
0
we get a minimum (this is global, since we have a parabola)
and we get
f
(
−
1
3
)
=
3
⋅
1
9
−
2
3
+
5
=
1
−
2
+
15
3
=
14
3
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