Test bac

Test bac

12th Grade

16 Qs

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Test bac

Test bac

Assessment

Quiz

Mathematics

12th Grade

Medium

Created by

ina paraschiv

Used 10+ times

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16 questions

Show all answers

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={22}S=\left\{2\sqrt{2}\right\} 

S={-1}

S={9}

 S={±22}S=\left\{\pm2\sqrt{2}\right\} 

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=

12\frac{1}{2}

23\frac{2}{3}

±23\pm\frac{2}{3}

±35\pm\frac{3}{5}

35\frac{3}{5}

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

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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