
Blatt 9
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Mathematics
University

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was ist die Bedingung, damit ein Polynom p(x) = x^3 - 2 eine rationale Nullstelle besitzt?
p hat einen Grad von 2
p hat keine reellen Nullstellen
p ist irreduzibel
p ist reduzibel
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Polynome p und q sind über Q irreduzibel, wenn p(x) = x^3 - 2 und q(x) = 8x^3 - 6x - 1 sind?
p(x) = x^3 - 2, q(x) = 8x^3 - 6x
p(x) = x^3 - 2, q(x) = 8x^2 - 6x - 1
p(x) = x^2 - 2, q(x) = 8x^3 - 6x - 1
p(x) = x^3 - 2, q(x) = 8x^3 - 6x - 1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welches Polynom r ∈ Q[x] vom Grad 4 hat die Nullstelle x0 = 1/2 * √(1 + √2)?
r(x) = x^4 - 2x^2 + 1
r(x) = x^4 - 2x^2 - 1
r(x) = x^4 + 2x^2 - 1
r(x) = x^4 + 2x^2 + 1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Warum ist das Polynom r über Q irreduzibel, wenn es in reelle lineare und quadratische Faktoren zerlegt wird?
r hat keine reellen Nullstellen
r hat komplexe Nullstellen
r hat eine rationale Nullstelle
r hat keine rationalen Nullstellen
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Menge B ist über Q linear unabhängig, wenn B = {1, √2, √4}?
B = {1, 2, 3}
B = {1, √2, √4}
B = {1, 2, 4}
B = {1, 3, 4}
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Welche Axiome erfüllt die Menge V = {x1 + x2√2 + x3√4 : x1, x2, x3 ∈ Q} als Teilmenge von R?
(U1) und (U3)
(U3) und (U4)
(U1) und (U2)
(U2) und (U3)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was folgt daraus, wenn die Abbildung M0: V → V: x ↦ x0 * x linear und injektiv ist?
x0 * x ∈ V
1/x0 ∈ V
x0 + x ∈ V
x0 ∈ V
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