Question

potrzebuję pomocy przy tych trudnych zadaniach.

załącznik poniżej,

Answer 1

1. x-4 < 3

x < 7

i

x-4 > -3

x > 1

x ∈ (1,7)

 

2. A\B = (-5,-1>

B\A = (4,+∞)

AuB = (-5,+∞)

AnB = (-1,4>

 

3. 3x-1 = 5

3x = 6

x = 2

i

3x - 1 = -5

3x = 4

x = ⁴/₃

 

4. x+7≠0

x≠-7

D = R \ {-7}

 

0 = 3x-2

3x = 2

x = ²/₃

M₀ = ⅔

 

5y = -8

y = -⁸/₅

f(-2) = -⁸/₅

 

5. 0 ≤ √[3x+5]

3x+5≤0

3x≤-5

x ≤ -⁵/₃

D = (-∞; -⁵/₃>

 

0 = √[3x+5]

3x = -5

x = -⁵/₃

M₀ = -⁵/₃

 

y = √[3*(-1)+5]

y = √2

f(-1) = √2

 

y = √[3*0+5]

y = √5

f(0) = √5