Question

Dau coroana. Maine am test si este urgentt

Answer 1

$1)\left\{1,2\right\}\times\left\{a,b\right\}=\left\{(1,a),(1,b),(2,a),(2,b)\right\}$

$2)f:\mathbb{R}\rightarrow\mathbb{R} \: \: \: ,f(x)=2x-3$

$f(2) = 2 \times 2 - 3 = 4 - 3 = 1$

$3)f:\mathbb{R}\rightarrow\mathbb{R} \: \: \: ,f(x)=2x-3$

$f(a) = 3$

$2 \times a - 3 = 3$

$2a = 3 + 3$

$2a = 6 \: | \div 2$

$a = 3$

$4)M(0,1)\:\in\:Oy$

$5)f:A\rightarrow B = > A \: domeniu \: de \: definitie$

Answer 2

Răspuns:

Explicație pas cu pas:

1.

{1: 2} × {a; b} = {(1; a), (1; b), (2; a), (2; b)}

2.

f : R -> R, f(x) = 2x - 3, f(2) = ?

f(x = 2) = 2 * 2 - 3 = 1

f(2) = 1

3.

f: R -> R, f(x) = 2x - 3 f(a) = 3, a = ?

f(x = a) = 2 * a - 3 =3

2a - 3 = 3

2a = 6

a = 3

4.

M(0; 1) ∈ $O_{x}$ sau $O_{y}$

M(x = 0, 1)

Daca x = 0 => M ∈ $O_{y}$

5.

f: A -> B, multimea A se numeste - ?

Multimea A se numeste domeniu de definitie.