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Problem
Problem
If
f
(
x
)
=
a
x
7
+
b
x
3
+
c
x
−
5
;
a
,
b
,
c
f(x) = ax^7 + bx^3 + cx - 5; a, b, c
f
(
x
)
=
a
x
7
+
b
x
3
+
c
x
−
5
;
a
,
b
,
c
are real constants and
f
(
−
7
)
=
7
f(-7) = 7
f
(
−
7
)
=
7
then maximum value of
∣
f
(
7
)
+
17
cos
x
∣
|f(7) + 17 \cos x|
∣
f
(
7
)
+
17
cos
x
∣
is
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