Question

Tentukan domain dan rangenya dari fungsi
f(x) = 1/√x

Answer 1

Df = { x ∈ R | f (x) ∈ R}
Df = { x ∈ R | 1/√x ∈ R}
Df = { x ∈ R | x ≥ 0, x ≠ 0 }
Df = (0, ∞)

Rf = {x ∈ R | x ∈ Df }
Rf = {x ∈ R | x ∈ (0, ∞) }
Rf = (0, ∞)