< Extrema < -3x^2+2xy-7y^2+x
Untersuche die
Funktion
f
:
R
2
⟶
R
,
(
x
,
y
)
⟼
−
3
x
2
+
2
x
y
−
7
y
2
+
x
,
{\displaystyle f\colon \mathbb {R} ^{2}\longrightarrow \mathbb {R} ,\,(x,y)\longmapsto -3x^{2}+2xy-7y^{2}+x,}
auf
Extrema
.
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,
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