Resposta:
1) Dada a função f (x) = 2x, determine x para:
a) f (1) = 2x → f (1 ) = 2 * 1 → f(1) = 2
b) f (4) = 2x → f(4) = 2 * 4 → f(4) = 8
c) f (- 1) =2x → f(-1) = 2 * (-1) → f(-1) = -2
d) f (- 2) = 2x → f(-2) = 2 * (-2) → f(-2) = -4
e) f (3) = 2x → f(3) = 2 * 3 → f(3) = 6
f) f (0) = 2x → f(0) = 2*0 → f(0) = 0
