Suppose that \( f: \mathbb{R} \to \mathbb{R} \) is a continuous function such that the sequence \( f(x), f(2x), f(3x), \dots \) converges to \( 0 \) for any \( x > 0 \). Prove or disprove that \[ \lim_{x \to \infty} f(x) = 0. \]

Let \( f_n : [-1, 1] \to \mathbb{R} \) be a continuous function for \( n = 1, 2, 3, \dots \). Define
\[
g_n(y) := \log \int_{-1}^1 e^{y f_n(x)} dx.
\]
Suppose there exists a continuous function \( g: \mathbb{R} \to \mathbb{R} \) and \( y_0 \in \mathbb{R} \) such that \( \lim_{n \to \infty} g_n(y) = g(y) \) for all \( y \neq y_0 \). Prove or disprove that \( \lim_{n \to \infty} g_n(y_0) = g(y_0) \).