
Funções
Authored by Maria Miguel
Mathematics
10th Grade
Used 30+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Seja a função f : D → R dada pela lei de formação f(x) = 5x +2, de domínio D = { –1, 0, 1, 2, }. Determine o conjunto imagem dessa função.
R ={ -3, 2, 7, 12}
R ={ -3, 2, 7, 13}
R ={ 3, 2, 7, 12}
R ={ 3, 2, -7, 12}
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A função f é definida pela expressão f(x)=2x+1.
O valor de f-1(5) é:
-5
-1
2
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Qual das imagens seguintes representa uma função injetiva?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O gráfico da função dada por f(x)=2x-1 interseta o eixo das ordenadas no ponto:
(-1,0)
(0,1)
(0,-1)
(1,0)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Considere as funções f e g de gráficos
Gf ={(1,2), (2,3), (3,1)} e
Gg ={(1,1), (2,1), (3,1)}, respetivamente.
Qual das seguintes afirmações é falsa?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A função g é definida por: g(x)= -2x+1
9
6
3
7
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