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Mathematics
Problem
Find the value of
a
>
7
a>7
a
>
7
for which the distance between the points
P
(
a
,
3
,
5
)
P(a,3,5)
P
(
a
,
3
,
5
)
and
Q
(
7
,
1
,
−
2
)
Q(7,1,-2)
Q
(
7
,
1
,
−
2
)
is
9
9
9
units. a)
7
+
2
17
7+2\sqrt{17}
7
+
2
17
b)
7
+
4
7
7+4\sqrt{7}
7
+
4
7
c)
7
+
2
7
7+2\sqrt{7}
7
+
2
7
d)
7
+
77
7+\sqrt{77}
7
+
77
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