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Mathematics
Mathematics
Problem
The points
P
(
2
,
k
)
P(2,k)
P
(
2
,
k
)
and
Q
(
5
,
7
)
Q(5,7)
Q
(
5
,
7
)
are such that the line
P
Q
PQ
P
Q
is perpendicular to the line through
R
(
1
,
3
)
R(1,3)
R
(
1
,
3
)
and
S
(
4
,
11
)
S(4,11)
S
(
4
,
11
)
. Find
k
k
k
.
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