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Álvaro Antônio de Lacerda Rosário 2025-10-23 21:19:15 -03:00
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Estudos/Pré-calculo/Exercício 3-4.md
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2. Para quaisquer $a$, $b$, $c$, $d$, reais, se $3a + 3b + 1 = 3d + 3c + 1$ então $a + b = d + c$
> **Verdadeiro**, pois se obtém $3a + 3b = 3d + 3c \Rightarrow a + b = d + c$
3. Para quaisquer $a$, $b$, $e$ reais, se $4a + 4b + 4e = 4a +4$ então $b + e = 1$
>**Verdadeiro**, pois se obtém $4b + = 4a \Rightarrow $
>**Verdadeiro**, pois se obtém $4b + 4e = 4 \Rightarrow 4(b+e) = 4 \Rightarrow b + e = 1$
4. Para quaisquer $a$, $b$, $c$, $x$ reais, se $3x + ab + ac = 3x +4a$ então $b + c = 4$
>
5. Para quaisquer $a$, $b$, $c$, $x$ reais, se $3x + ab + ac = 3x + 4a$ então ou $a = 0$ ou $b + c = 4$