Question

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Answer 1

Resposta:

Explicação passo a passo:

1) f(x) = 3x - 2

a)

$f(0)=3(0)-2\\f(0)=-2$

b)

$f(1)= 3(1)-2\\f(1)=1$

c)

$f(-2)= 3(-2)-2\\f(-2)=-6-2\\f(-2) = -8$

d)

$f(-4) = 3(-4)-2\\f(-4)=-12-2\\f(-4)=-14$

2) f(x) = x² - 5x - 10

a)

$f(4)= 4^2-5(4)-10\\f(4) = 16-20-10\\f(4)= -14$

b)

$f(-2) = (-2)^2-5(-2)-10\\f(-2)= 4 +10 -10\\f(-2) = 4$

3) f(x) = x + 1/x

a)

$f(3) = 3 + \frac{1}{3} \\f(3) = \frac{10}{3}$

b)

$f(-1) = -1 +\frac{1}{-1} \\f(-1) = -1 -1\\f(-1) = -2$

c)

$f(1) + f(2)\\1+\frac{1}{1} + 2+\frac{1}{2} \\4 + \frac{1}{2} \\\frac{9}{2}$

d)

$f(\frac{1}{2}) = \frac{1}{2} +\frac{1}{\frac{1}{2} }\\y = \frac{1}{2} + 1*2\\f(\frac{1}{2}) = \frac{5}{2}$