tìm giới hạn của các hàm số sau:

1) \mathop {\lim }\limits_{x \to\ - infty \frac{x^{3} + x^{2}.sin2x + \cos x^{3} -1}{ (x+1)^{2}}

2) Tìm m để phương trình: 2x^{3} -(m+3)x^{2} + (2m-3)x +2 =0 có 3 nghiệm lập thành 1 cấp số cộng

3) lim (n-2 - \sqrt{3n^{2}+n-1} ; \mathop {\lim }\limits_{x \to \ - infty } \frac{\sqrt[3]{x^{3}-2x+1}-1}{x^{2}+2x}

4) Cho hàm số f(x) = \begin{cases}x= sinx khi x\in \left[ { \frac{-\pi}{2}; \frac{\pi}{2} \right] \\ y= ax+b khi x\notin \left[ {\frac{-\pi}{2}; \frac{\pi}{2} } \right] \end{cases}

xác định a.b để hàm số liên tục trên R

Bạn cần đăng nhập để có thể gửi đáp án

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