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Mathematics
Mathematics
Problem
For real parameter
k
k
k
, consider the function
f
(
x
)
=
1
x
−
k
f(x)=\dfrac{1}{x-k}
f
(
x
)
=
x
−
k
1
. Which of the following correctly describes its domain? a) all real
x
x
x
except
x
=
0
x=0
x
=
0
b) all real
x
x
x
except
x
=
k
x=k
x
=
k
c) all real
x
x
x
d) all real
x
x
x
except
x
=
−
k
x=-k
x
=
−
k
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