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Mathematics
Mathematics
Problem
If
x
2
+
y
2
=
t
−
1
t
,
x
4
+
y
4
=
t
2
+
1
t
2
x^2 + y^2 = t - \frac{1}{t}, x^4 + y^4 = t^2 + \frac{1}{t^2}
x
2
+
y
2
=
t
−
t
1
,
x
4
+
y
4
=
t
2
+
t
2
1
, then
x
3
y
d
y
d
x
=
x^3 y \frac{dy}{dx} =
x
3
y
d
x
d
y
=
(a) 1 (b) 2 (c) 3 (d) 4
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