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Mathematics
Mathematics
Problem
For the function
f
(
x
)
=
x
3
+
k
x
f(x)=x^{3}+k x
f
(
x
)
=
x
3
+
k
x
, determine the value of
k
k
k
if the tangent to the curve at
x
=
1
x=1
x
=
1
is horizontal. a)
0
0
0
b)
−
3
-3
−
3
c)
3
3
3
d)
−
1
-1
−
1
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