Oie, tudo bom?
2.
[tex]f(x) = \frac{x + 3}{7} \\ y = \frac{x + 3}{7} \\ x = \frac{y + 3}{7} \\ \frac{y + 3}{7} = x \\ y + 3 = 7x \\ y = 7x - 3 \\ \boxed{f {}^{ - 1} (x) = 7x - 3}[/tex]
[tex]f {}^{ - 1} (1) = 7 \: . \: 1 - 3 \\ f {}^{ - 1} (1) = 7 - 3 \\ \boxed{f {}^{ - 1}(1) = 4 }[/tex]
3.
[tex]f(g(x)) = 3(x - 2) + 1 \\ f(g(x)) = 3x - 3 \: . \: 2 + 1 \\ f(g(x)) = 3x - 6 + 1 \\ \boxed{f(g(x)) = 3x - 5}[/tex]
[tex]f(g(5)) = 3 \: . \: 5 - 5 \\ f(g(5)) = 15 - 5 \\ \boxed{f(g(5)) = 10}[/tex]
4.
[tex]y = x - 2 \\ f(5) = 5 - 2 \\ \boxed{f(5) = 3}[/tex]
Att. NLE Top Shotta
