a) f(x) = 1,2^x
lim (x → -∞) f(x) = 0^{+}
lim (x → +∞) f(x) = ∞
Asymptote: y = 0
b) f(x) = 0,5^x
lim (x → -∞) f(x) = ∞
lim (x → +∞) f(x) = 0^{+}
Asymptote: y = 0
c) f(x) = 2 * 0,3^x + 1
lim (x → -∞) f(x) = ∞
lim (x → +∞) f(x) = 1
Asymptote: y = 1
d) f(x) = -3 * 2,5^x
lim (x → -∞) f(x) = 0^{-}
lim (x → +∞) f(x) = -∞
Asymptote: y = 0