Question

Fie multimea A=
$\frac{9}{ - 3}$

$\sqrt{0.(4)}$
$\frac{ - 20}{ - 5}$
$\sqrt{5 \frac{4}{9} }$
$- \sqrt{15}$
$\sqrt{0.1}$
$2$
${( - 2)}^{ - 2}$
${( - \frac{1}{2}) }^{ - 1}$
Determinati : A intersectat cu N
A intersectat cu Z
A intersectat cu Q
A intersectat cu (R-Q)
A\Z
A\Q
A\(R-Q)



VA ROG AJUTATI.MA ​

Answer 1

9/-3 = -3

V0,(4) = V(4/9) = 2/3

-20/-5 = 4

V5 4/9 = V(49/9) = 7/3

V0,1 = V(1/10) = 1/V10

(-2)⁻² = 1/4

(-1/2)⁻¹ = 2/-1 = -2

A∩ N ={-20/-5; 2}

A∩ Z ={9/-3; -20/-5; 2; (-1/2)⁻¹}

A∩ Q={9/-3; -20/-5; 2; (-1/2)⁻¹; V0,(4); V5 4/9; (-2)⁻²}

A ∩ (R/Q) = {-V15; V0,1}

A/Z = {V0,(4); V5 4/9; (-2)⁻²}

A/Q = {-V15; V0,1}

A/{R/Q} = multime vida