
Functii
Authored by IOANA RALUCA DUMACHI
Mathematics
8th Grade

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5 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 10 pts
1.Ce este o funcție? (1 răspuns corect)
O ecuație cu necunoscute
O regulă care asociază fiecărui element dintr-o mulțime unică un element din altă mulțime
O formulă de calcul a ariei
Un desen cu puncte și linii
2.
MULTIPLE SELECT QUESTION
45 sec • 20 pts
2.Care dintre următoarele sunt exemple de funcții? (Alege 2 variante corecte)
f(x)=2x+1
A=πr2
y=1/x
x+y=7
3.
MULTIPLE SELECT QUESTION
45 sec • 10 pts
3. Dacă f(x)=x2 atunci f(3)=?(1 răspuns corect)
3
6
9
12
4.
MULTIPLE SELECT QUESTION
45 sec • 20 pts
4. Cum putem reprezenta grafic o funcție? (Alege 2 variante corecte)
Printr-un tabel cu valori x și f(x)
Printr-o ecuație cu două necunoscute
Pe un plan cu axele Ox și Oy
Printr-un text explicativ
5.
MULTIPLE SELECT QUESTION
45 sec • 10 pts
5. Care afirmație este adevărată despre funcția f(x)=2x−1? (1 răspuns corect)
Este o funcție constantă
Graficul său este o parabolă
Este o funcție liniară
Nu are valori negative
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