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Domain Fungsi№. a
Fungsi f(x) akan terdefinisi jika 2x - 5 ≠ 0
2x - 5 ≠ 0
x ≠ 5/2
Df = {x| x ≠ 5/2 , x ∈ R}
№. b
h(x) = √(x² - 16)
Akan terdefinisi utk x² - 16 ≥ 0
x² - 16 ≥ 0
(x + 4)(x - 4) ≥ 0
x ≤ -4 atau x ≥ 4
Dh = {x|x ≤ -4 atau x ≥ 4, x ∈ R}
№. c
g(x) = 7/(9 - x²)
Akan terdefinisi utk 9 - x² ≠ 0
9 ≠ x²
x ≠ 3 atau x ≠ -3
Dg = {x| x ≠ -3 atau x ≠ 3, x ∈ R}