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equazioni e disequazioni di grado superiore al secondo

Authored by Silvia Formaggia

Mathematics

11th Grade

Used 221+ times

equazioni e disequazioni di grado superiore al secondo
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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 −2x4≤0-2x^4\le0  

 x≥0x\ge0  

 x≤0x\le0  

 ∀x∈R\forall x\in R  

Impossibile

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 27x3−1≥027x^3-1\ge0 
ha soluzione

 x≤−13∨x≥13x\le-\frac{1}{3}\vee x\ge\frac{1}{3}  

 x>13x>\frac{1}{3}  

 x≥13x\ge\frac{1}{3}  

 x≥−13x\ge-\frac{1}{3}  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

x3+8≤0x^3+8\le0

x≤−2x\le-2

−2≤x≤2-2\le x\le2

x≤−8 ∨ x≥+8x\le-\sqrt{8}\ \vee\ x\ge+\sqrt{8}

Impossibile

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 3x4−2x3−x2≤03x^4-2x^3-x^2\le0 

 x≤−13 ∨ 0≤x≤1x\le-\frac{1}{3}\ \vee\ 0\le x\le1  

 −13≤x≤1-\frac{1}{3}\le x\le1  

 x≤−13∨x≥1x\le-\frac{1}{3}\vee x\ge1  

Impossibile

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 x4−81<0x^4-81<0 

 x<3x<3 

 −3<x<3-3<x<3 

 ∀ x∈R\forall\ x\in R 

Impossibile

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Quali delle seguenti equazioni è impossibile?

−3x6=−3-3x^6=-3

8x3+1=08x^3+1=0

25x10+5=025x^{10}+5=0

x7+1=0x^7+1=0

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

L'equazione  x2007+1=0x^{2007}+1=0  

non ha soluzioni reali

ha esattamente 2007 soluzioni reali

ha una sola soluzione reale

ha esattamente 2008 soluzioni reali

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