Funções crescentes, decrescentes, monótonas, pares, ímpares, derivadas no ponto, etc.
11 abr 2018, 19:40
f(x)= x+3 / x+1,
A) f(x)-f(1) / x-1
19 abr 2018, 15:25
\(\dfrac{f(x)-f(1)}{x-1} = \dfrac{\dfrac{x+3}{x+1}-2}{x-1}= \dfrac{x+3-2x-2}{x-1} =\dfrac{1-x}{x-1} = -1, \quad x \ne 1\)
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