ADMICRO

Cho hàm số y =f(x) có \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaCbeaeaaci % GGSbGaaiyAaiaac2gaaSqaceaa9qGaamiEaiabgkziUkabgUcaRiab % g6HiLcqabaGccaWGMbWaaeWaaeaacaWG4baacaGLOaGaayzkaaGaey % ypa0JaaGymaaaa!43B9! \mathop {\lim }\limits_{x \to + \infty } f\left( x \right) = 1\) và \(% MathType!MTEF!2!1!+- % feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaCbeaeaaci % GGSbGaaiyAaiaac2gaaSqaceaa9qGaamiEaiabgkziUkabgkHiTiab % g6HiLcqabaGccaWGMbWaaeWaaeaacaWG4baacaGLOaGaayzkaaGaey % ypa0JaeyOeI0IaaGymaaaa!44B1! \mathop {\lim }\limits_{x \to - \infty } f\left( x \right) = - 1\) . Khẳng định nào sau đây là đúng?

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