1- Sendo A={1,2,3,4} e B={1,2,3,4,5,6,7}, a alternativa Falsa é:
A. B-A = {5,6,7}
B. A-B = 0
B
C. C = 0
A
D. A B = {1,2,3}
A
E. C ={5,6,7}
B
D. A B = {1,2,3}
A
C. C = {5,6,7}
B

3 4
2- F(x)= √3-x / 2x+6 + √ 3+x
O conjunto dominio da função :
A. {X E R/ X >= -3}
B. {X E R / X >3}
C. {X E R / X > -3}
D. {X E R / X >= 3}
E. ] - ∞,3]
Alguem pode me ajudar a resolver esses exercicios.
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