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Mathematics
Problem
For the inequalities $x + y geq 2
,
,
,
x + ky \le 6
,
,
,
x \ge 0
,
,
,
y \ge 0
,
f
o
r
w
h
i
c
h
v
a
l
u
e
s
o
f
t
h
e
r
e
a
l
p
a
r
a
m
e
t
e
r
, for which values of the real parameter
,
f
or
w
hi
c
h
v
a
l
u
eso
f
t
h
er
e
a
l
p
a
r
am
e
t
er
k$ is the feasible region bounded? a)
k
<
0
k<0
k
<
0
b)
k
=
0
k=0
k
=
0
c)
k
>
0
k>0
k
>
0
d)
all real
k
\text{all real }k
all real
k
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