A = { x ∈ R , x < 2 } A=\left\{x\ \in R,\ x<2\right\} A = { x ∈ R , x < 2 } A=.....

( − ∞ ; 2 ) \left(-\infty;\ 2\right) ( − ∞ ; 2 )

6 18 + 12 8 − 11 32 6\sqrt{18}+12\sqrt{8}-11\sqrt{32} 6 1 8 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 2 8 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> − 1 1 3 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> Rezultatul calculului este....

− 2 2 -2\sqrt{2} − 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

6 2 6\sqrt{2} 6 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 2 2\sqrt{2} 2 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

− 6 2 -6\sqrt{2} − 6 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

A = ( − ∞ ; 3 ) s i B = ( − 4 ; ∝ ) A=\left(-\infty;3\right)\ si\ B=\left(-4;\propto\right) A = ( − ∞ ; 3 ) s i B = ( − 4 ; ∝ ) Atunci A ∩ B = A\cap B= A ∩ B =

( − 4 ; 3 ) \left(-4;3\right) ( − 4 ; 3 )

( 3 ; − 4 ) \left(3;-4\right) ( 3 ; − 4 )

⌈ − 4 ; 3 ⌉ \lceil-4;3\rceil ⌈ − 4 ; 3 ⌉

a = 2 3 + 1 + 3 − 3 a=\frac{2}{\sqrt{3}+1}+3-\sqrt{3} a = 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 1 2 + 3 − 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> a=......

3 + 3 3+\sqrt{3} 3 + 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

6 − 3 6-\sqrt{3} 6 − 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 3 + 2 2\sqrt{3}+2 2 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> + 2

Fie prisma triunghiulara regulata dreapta de mai sus. AB= 6 cm ,iar BB'=8 cm. Lungimea diagonalei AB' este de.....cm.

8 3 8\sqrt{3} 8 3 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

6 2 6\sqrt{2} 6 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

8 2 8\sqrt{2} 8 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Q recapitulare 8 sem.I Quiz: 15 Practice Questions (Grade 8)

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

$A=\left\{x\ \in R,\ x<2\right\}$ A=.....

$\left(-\infty;\ 2\right)$

(-2 ; 2)

$\left(2;\ +\infty\right)$

[-2; 2]

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media geometrica a numerelor
$7-4\sqrt{3}\ si\ \ 7+4\sqrt{3}$ este.....

12

5

3

1

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Descompunerea in factori a expresiei
$x^2-7x+6$ este....

(x -1)(x+6)

(x-1)(x-6)

(x+1)(x-6)

(x+1)(x+6)

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Lungimea laturii unui romb este egala cu 20 cm, iar una din diagonale este egala cu 24 cm. Aria rombului este egala cu.... $cm^2$

360

164

384

252

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

O carte costa 10 lei. Micsorand pretul cu 5%, aceasta va costa ...lei.

9

9,5

3,5

4,25

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Un triunghi echilateral si un patrat au fiecare perimetrul de 12 cm. Raportul dintre latura triunghiului si cea a patratului este egal cu...

$\frac{4}{4}$

$\frac{3}{4}$

$\frac{4}{3}$

$\frac{2}{3}$

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

$6\sqrt{18}+12\sqrt{8}-11\sqrt{32}$
Rezultatul calculului este....

$6\sqrt{2}$

$2\sqrt{2}$

$-2\sqrt{2}$

$-6\sqrt{2}$

8.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

$x^3+x^2-9x-9$ Descompunand in factori, obtinem.....

(x-1)(x-3)(x+3)

(x+1)(x+9)

(x+1)(x+3)(x-3)

(x-1)(x+9)

9.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Fie cubul de mai sus. Masura unghiului dintre dreptele EB si AH este egal cu....

$45\degree$

$90\degree$

$60\degree$

$180\degree$

10.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

$A=\left(-\infty;3\right)\ si\ B=\left(-4;\propto\right)$
Atunci $A\cap B=$

$\left(-\infty;+\propto\right)$

$\left(3;-4\right)$

$\left(-4;3\right)$

$\lceil-4;3\rceil$

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Q recapitulare 8 sem.I

A={x ∈R, x<2}A=\left\{x\ \in R,\ x<2\right\}A={x ∈R, x<2} A=.....

Media geometrica a numerelor 7−43 si 7+437-4\sqrt{3}\ si\ \ 7+4\sqrt{3}7−43​ si 7+43​ este.....

Descompunerea in factori a expresiei x2−7x+6x^2-7x+6x2−7x+6 este....

Lungimea laturii unui romb este egala cu 20 cm, iar una din diagonale este egala cu 24 cm. Aria rombului este egala cu.... cm2cm^2cm2

O carte costa 10 lei. Micsorand pretul cu 5%, aceasta va costa ...lei.

Un triunghi echilateral si un patrat au fiecare perimetrul de 12 cm. Raportul dintre latura triunghiului si cea a patratului este egal cu...

618+128−11326\sqrt{18}+12\sqrt{8}-11\sqrt{32}618​+128​−1132​ Rezultatul calculului este....

x3+x2−9x−9x^3+x^2-9x-9x3+x2−9x−9 Descompunand in factori, obtinem.....

Fie cubul de mai sus. Masura unghiului dintre dreptele EB si AH este egal cu....

A=(−∞;3) si B=(−4;∝)A=\left(-\infty;3\right)\ si\ B=\left(-4;\propto\right)A=(−∞;3) si B=(−4;∝) Atunci A∩B=A\cap B=A∩B=

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Discover more resources for Mathematics

$A=\left\{x\ \in R,\ x<2\right\}$ A=.....

Media geometrica a numerelor
$7-4\sqrt{3}\ si\ \ 7+4\sqrt{3}$ este.....

Descompunerea in factori a expresiei
$x^2-7x+6$ este....

Lungimea laturii unui romb este egala cu 20 cm, iar una din diagonale este egala cu 24 cm. Aria rombului este egala cu.... $cm^2$

$6\sqrt{18}+12\sqrt{8}-11\sqrt{32}$
Rezultatul calculului este....

$x^3+x^2-9x-9$ Descompunand in factori, obtinem.....

$A=\left(-\infty;3\right)\ si\ B=\left(-4;\propto\right)$
Atunci $A\cap B=$