Cho hàm số f(x) = x^2
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Cho hàm số 
Mệnh đề nào sau đây đúng?
\(\mathop {\lim }\limits_{x \to {1^ - }} f(x) = \mathop {\lim }\limits_{x \to {1^ - }} \left( {x + 1} \right)\).
\(\mathop {\lim }\limits_{x \to {0^ + }} f(x) = \mathop {\lim }\limits_{x \to {0^ + }} \left( {x + 1} \right)\).
\(\mathop {\lim }\limits_{x \to {1^ + }} f(x) = \mathop {\lim }\limits_{x \to {1^ + }} \left( {x + 1} \right)\).
\(\mathop {\lim }\limits_{x \to {1^ + }} f(x) = \mathop {\lim }\limits_{x \to {1^ + }} {x^2}\).
Giải thích
Chọn C
Xét \(x \to {1^ + }\) \((x > 1)\) thì \(\mathop {\lim }\limits_{x \to {1^ + }} f(x) = \mathop {\lim }\limits_{x \to {1^ + }} \left( {x + 1} \right)\).