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Mathematics
Mathematics
Problem
A moving point satisfies
x
y
=
9
xy=9
x
y
=
9
. When
x
=
3
x=3
x
=
3
and is increasing at
5
units s
−
1
5\,\text{units s}^{-1}
5
units s
−
1
, find
d
y
d
t
\dfrac{dy}{dt}
d
t
d
y
at that instant.
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