Cho lim x suy ra 1 ((f(x) - 4) / (x - 1)) = 2. Tính lim x suy ra 1 3f(x)
Cho lim. Tính:
\mathop {\lim }\limits_{x \to 1} 3f\left( x \right).
Ta có \mathop {\lim }\limits_{x \to 1} 3f\left( x \right) = \mathop {\lim }\limits_{x \to 1} 3.\mathop {\lim }\limits_{x \to 1} f\left( x \right) = 3.4 = 12.