Barber Coles
10/10/2023 · Middle School

2. Seja \( f \) uma relaçāo do \( A=\{-4,-3,-2,-1,0\} \) em \( B=(-3,-2,-1,0,1,2,3,4,5) \) definida por \( f(x)=2 x+5 \). Realize os cálculos necossários e em soguida faça o diagrama de setas de \( f \) e verifique se \( f \) é uma funçăo do \( A \) em \( B \). Em caso afirmativo, delermine: a) Seu dominio \( D \) : b) \( O \) conjunto imagem da função Im: c) \( f(-2) \); d) \( f(0) \).

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Para verificar se \( f \) é uma função de \( A \) em \( B \), calculamos \( f(x) \) para cada \( x \in A \) e verificamos se os valores pertencem a \( B \). \( f(-4) = -3 \), \( f(-3) = -1 \), \( f(-2) = 1 \), \( f(-1) = 3 \), \( f(0) = 5 \). Todos os valores pertencem a \( B \), então \( f \) é uma função de \( A \) em \( B \). O domínio \( D \) é \( A = \{-4, -3, -2, -1, 0\} \), o conjunto imagem \( \text{Im} \) é \( \{-3, -1, 1, 3, 5\} \), \( f(-2) = 1 \), \( f(0) = 5 \).

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