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Jika a,b 0 dan a,b 1 maka berlaku :
1. a f(x) = 1 → f(x) = 0
b
2. a f(x) = a → f(x) = b
3. a f(x) = a g(x) → f(x) g(x)
=
4. a f(x) = b f(x) → f(x) = 0
=
5. a f(x) = b g(x) → (loga).f(x) (logb).g(x)
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