Question

Seja f: ℝ --- ℝ a função dada por () = x / x + 1 , quando vale (1) ∙ (2) ∙ (3) ? *

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Answer 1

f(x) = x / x + 1
f(1) = 1 / 1+1 = 1/2
f(2) = 2 / 2 + 1 = 2/3
f(3) = 3 / 3 + 1 = 3/4

f(1) . f(2) . f(3) = 1/2 . 2/3 . 3/4 = 6/24 = 1/4