15.03. 8.raz Q2 Matematika kviz
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Amer Bralic
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nejednakost a<b i c<d sabiranjem daje:
Answer explanation
Sabiranjem lijeve i desne strane nejednakosti dobijamo a+c<b+d.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ako su 0<x<2 i 0<y<5, množenjem dobijamo:
Answer explanation
Množenjem pozitivnih nejednakosti 0<x<2 i 0<y<5 dobijamo 0<xy<10.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kod stroge nejednakosti −1<x, da li −1 pripada rješenju?
Answer explanation
Broj -1 ne pripada rješenju jer nejednakost ne uključuje ovu vrijednost.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ako je −3≤x<4, onda je rješenje u intervalnoj formi:
Answer explanation
Intervalna notacija za nejednakost −3≤x<4 je [−3,4).
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nejednakost 2x+3<2(x+2) kad se proširi zagrada na desnoj strani postaje:
Answer explanation
Nakon proširivanja zagrade, nejednakost postaje 2x+3<2x+4.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ako x+2<7, onda x<_____.
Answer explanation
Oduzimanjem 2 sa obje strane dobijamo x<5.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ako je 2x+1=7, to nije nejednakost nego jednačina. Da li je rješenje strogo?
Answer explanation
Pošto je data jednačina, a ne nejednakost, odgovor je 'ne'.
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