Tính Lim 2x + 7/ x - 3
Giải thích
Chọn A
Ta có: \(\mathop {\lim }\limits_{x \to {3^ + }} \frac{{2x + 7}}{{x - 3}} = + \infty \). Vì \(\mathop {\lim }\limits_{x \to {3^ + }} (2x + 7) = 13\), \(\mathop {\lim }\limits_{x \to {3^ + }} (x - 3) = 0,\,\,x - 3 > 0\) khi \(x \to {3^ + }\).