Resposta:
Explicação passo a passo:
1) f(x) = 3x - 2
a)
[tex]f(0)=3(0)-2\\f(0)=-2[/tex]
b)
[tex]f(1)= 3(1)-2\\f(1)=1[/tex]
c)
[tex]f(-2)= 3(-2)-2\\f(-2)=-6-2\\f(-2) = -8[/tex]
d)
[tex]f(-4) = 3(-4)-2\\f(-4)=-12-2\\f(-4)=-14[/tex]
2) f(x) = x² - 5x - 10
a)
[tex]f(4)= 4^2-5(4)-10\\f(4) = 16-20-10\\f(4)= -14[/tex]
b)
[tex]f(-2) = (-2)^2-5(-2)-10\\f(-2)= 4 +10 -10\\f(-2) = 4[/tex]
3) f(x) = x + 1/x
a)
[tex]f(3) = 3 + \frac{1}{3} \\f(3) = \frac{10}{3} \\[/tex]
b)
[tex]f(-1) = -1 +\frac{1}{-1} \\f(-1) = -1 -1\\f(-1) = -2[/tex]
c)
[tex]f(1) + f(2)\\1+\frac{1}{1} + 2+\frac{1}{2} \\4 + \frac{1}{2} \\\frac{9}{2}[/tex]
d)
[tex]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}[/tex]
