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AP EAMCET Engineering 2015 Code C Paper
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© examsnet.com
Question : 30
Total: 160
If
x
2
+
y
2
=
t
+
1
t
and
x
4
+
y
4
=
t
2
+
1
t
2
then
d
y
d
x
=
−
x
y
−
y
x
x
2
y
2
y
2
x
2
Validate
Solution:
x
2
+
y
2
=
t
+
1
t
;
x
4
+
y
4
=
t
2
+
1
t
2
x
4
+
y
4
+
2
x
2
y
2
=
t
2
+
1
t
2
+
2
t
2
+
1
t
2
+
2
x
2
y
2
=
t
2
+
1
t
2
+
2
x
2
y
2
=
1
d
y
d
x
=
−
2
x
y
2
2
y
x
2
=
−
y
x
© examsnet.com
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