
Test bac
Authored by ina paraschiv
Mathematics
12th Grade
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16 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
În progresia aritmetica an, n>=1, a2=5, a5=2. Suma primilor 6 termeni este:
20
21
23
25
7
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Se considera functia f:R→R, f(x)=x2-2x-8. Numerele intregi x pentru care f(x)<0 sunt:
-1,0,1,2
-1,0,1,2,3
-1,0,1,2,3,4
-2,-1,0,1,2,3
-2,-1,0,1,2,3,4
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Multimea solutiilor reale ale ecuatiei log3(x2-8x)=2 este:
S={-1}
S={9}
S={-1, 9}
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Cate numere naturale de trei cifre au cifrele din multimea A={1,2,3,4,5} si contin cel putin o cifra para?
10
60
125
98
90
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In reperul cartezian xOy se considera punctele A(1,2), B(3,-1) si C(1,-2). Ecuatia inaltimii din A a triunghiului ABC este:
y=-2x+2
x+y+2=0
y+2x=0
y=4-2x
2x+y+4=0
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In triunghiul ascutitunghic ABC aria este egala cu 4, AB=2, BC=5 . Atunci cosB=
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
unde a,b,c sunt numere reale.
Det(A(a,b,c))=
a+b+c
abc-a-b-c
a+b+c-abc+1
abc-a-b-c+2
abc-a-b-c-2
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