Zadanie 6.1. Zbadać, czy poniższe funkcje są formami dwuliniowyo»;
a) F: R2 x R2 -> R, ^ j = -xtyt + 2x,y2 + 2x2y, - 4x2y2 >
b) Fpif xR2 -»R,F L ' 11 M 5jc,x2-Sytfi•
c) F:R2xR2-»R, ^ x ty *iFi +JC2^i»
= x,yl+2x2y2+xJ,
d) F:R3xR3->R, F
e) F:R3xR3 ->R* F
f) f:R3xR3->R. F
g) F:RJxR3 ->R» F
= xlyl+x2y2+x3yJ+lO,
i) F:R3xR3->R»
V |
>,T |
*2 |
y2 |
M |
fj |
*4. |
.y*i |
Xl |
MI |
-X2j |
UJJ |
det
*i Fi
Xj y2
i) F:R2xR2 ->R, F|
Zadanie 6.2. Zapisać poniższe formy dwuliniowe w postaci macierzowej: a)
= -3*,}', + 2x,y2 - x2y, + 5x2y2,
= 2xlyi+5x2y2,
Ąxi-x2'fot-y2),
= -xly]+2x1y2-3x3yi,
=3x,y2 ~ 2xi yj+x2 Fi - 7x2y2+5 x3y, + 2 x3y2,
*x,(2y, -y3 -2y4)-y2(-x, +2x2 +3jc3+4^).
|
d) F|
f[ |
X'1 |
fi |
l |
,X2 J |
WJ |
Ą |
X\ |
[i |
I |
pij |
UJJ |
f| |
V |
[i |
*2. |
Lf2JJ | |
n |
-1\ | |
X, |
Fi | |
F |
*2 |
y2 |
*3. |
.y* l | |
_» | ||
*1 |
Fi | |
F |
x2 |
y2 |
*3. |
.FąJJ | |
*|j | ||
■*i |
Fi | |
F |
*2 |
Fj |
*3 |
Fj | |
L' .sja |
L
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