TEST INIȚIAL, clasa a XII-a A
Quiz
•
Mathematics
•
11th Grade
•
Hard
SANDA BARBU
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11 questions
Show all answers
1.
DROPDOWN QUESTION
1 min • 4 pts
Pe mulțimea numerelor reale se definește legea de compoziție x*y = 2xy - 4(x + y) + 7. Rezultatul calculului (-2)*2 este:
(a)
7
-9
15
2.
DRAG AND DROP QUESTION
2 mins • 4 pts
Pe mulțimea numerelor reale se definește legea de compoziție x*y = xy - 5(x + y) + 30. Elementul neutru al legii de compoziție „*” este:
(a)
-6
5
0
3.
MULTIPLE CHOICE QUESTION
1 min • 4 pts
Rezultatul calculului în Z₁₁ este:
4.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
Pe mulțimea numerelor reale se definește legea de compoziție x*y = xy + 3x + 3y + 6. Numărul real a pentru care a*x = a, pentru orice număr real x, este egal cu:
-3
2
-2
3
5.
DROPDOWN QUESTION
1 min • 4 pts
Pe mulțimea numerelor reale se definește legea de compoziție asociativă x*y = xy - (x + y) + 2. Simetricul lui 4 în raport cu legea de compoziție „*” este:
(a)
3/4
1/2
nu există
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Care este expresia echivalentă cu x*x pentru orice număr real x, dacă x*y = xy + x + y?
(x+1)² - 1
(x-1)² + 1
(x+2)² - 4
(x-2)² + 4
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
3 si 4
3 si 5
3 si 6
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