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Mathematics
Mathematics
Problem
Determine the slope
d
y
d
x
\dfrac{dy}{dx}
d
x
d
y
of the curve
x
2
+
x
y
+
y
2
=
7
x^{2}+xy+y^{2}=7
x
2
+
x
y
+
y
2
=
7
at the point
(
1
,
2
)
(1,2)
(
1
,
2
)
. a)
4
5
\dfrac{4}{5}
5
4
b)
−
1
-1
−
1
c)
−
4
5
-\dfrac{4}{5}
−
5
4
d)
−
5
4
-\dfrac{5}{4}
−
4
5
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