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Mathematics
Mathematics
Problem
If the curves
y
2
=
6
x
y^2 = 6x
y
2
=
6
x
,
9
x
2
+
b
y
2
=
16
9x^2 + by^2 = 16
9
x
2
+
b
y
2
=
16
intersect each other at right angles, then the value of
b
b
b
is : (1) 6 (2)
7
2
\frac{7}{2}
2
7
(3) 4 (4)
9
2
\frac{9}{2}
2
9
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