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CBSE XII
>>
Math
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Continuity and Differentiability
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Q)
Find
d
y
d
x
if
(
(
x
2
+
y
2
)
2
=
x
y
)
(
A
)
y
−
4
x
(
x
2
+
y
2
)
4
y
(
x
2
+
y
2
)
−
x
(
B
)
y
+
4
x
(
x
2
+
y
2
)
4
y
(
x
2
+
y
2
)
−
x
(
C
)
y
−
4
x
(
x
2
+
y
2
)
4
y
(
x
2
−
y
2
)
−
x
(
D
)
y
−
2
x
(
x
2
+
y
2
)
4
y
(
x
2
+
y
2
)
−
x
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