Polinomis. Reforç matemàtiques 2n ESO
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Xavi Riera
Used 15+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Un polinomi és...
la suma o resta de diversos monomis.
un conjunt de monomis que es sumem o resten i que cada un s'anomena terme del polinomi.
un conjunt de termes i aquell que no té part literal s'anomena terme independent.
totes les opcions són correctes.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
El polinomi de tres termes, que és de grau 3 i que el terme independent és -8 és:
6x3 - 8
5xyz + 8yz + 2y - 8
2x3 + 3x - 8
a3 + 3a4 - 8
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
El polinomi 5ab - 5ax2b té grau...
grau 4, que és el grau major dels termes que el composen.
grau 2, que és el grau del primer terme del polinomi.
grau 2, perquè té dos termes.
grau 2, perquè si simplifiques l'expressió, el resultat és x2
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calcula el valor numèric del polinomi de sota quan x= 3:
x2 - 2x + 1
4
1
2
7
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Si tenim els polinomis A(x) i B(x), calcula el polinomi suma A(x) + B(x)
A(x)= 7x2 - 3x +1
B(x)= 2x2 + 4x - 6
9x2 + x - 5
9x2 - 7x - 7
9x4 - 7x2 - 7
9x2 + 7x - 5
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Si tenim els polinomis A(x) i B(x), calcula el polinomi resta A(x) - B(x)
A(x)= 7x2 - 3x +1
B(x)= 2x2 + 4x - 6
5x2 + x - 5
5x2 - 7x +7
5x2 - 7x +7
5x4 + x2 -5
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Si tenim el polinomi P(x) = 3x2 - 2x - 6, i el volem multiplicar pel monomi 3x2, assenyala el resultat:
9x4 - 6x3 - 18x2
9x4 - 6x2 - 18
6x4 - 5x3 - 9x2
6x4 - 6x3 - 12x2
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