a) $\lim \frac{3 n^{3}-2 n+1}{2 n^{2}-3}$

Q: a) $\lim \frac{3 n^{3}-2 n+1}{2 n^{2}-3}$

<p><span class="math-tex">$\begin{array}{l}\text { Ta có : } \lim \left(3-\frac{2}{n^{2}}+\frac{1}{n^{3}}\right)=3\gt 0 \text { (1) } \\ \text { và } \lim \left(\frac{2}{n}-\frac{3}{n^{3}}\right)=0, \frac{2}{n}-\frac{3}{n^{3}}>0, \forall n \in \mathbb{N}(n \geq 2) \\ L=+\infty \text { (3) }\end{array}$</span></p>

Question

Accepted Answer

$\begin{array}{l}\text { Ta có : } \lim \left(3-\frac{2}{n^{2}}+\frac{1}{n^{3}}\right)=3\gt 0 \text { (1) } \ \text { và } \lim \left(\frac{2}{n}-\frac{3}{n^{3}}\right)=0, \frac{2}{n}-\frac{3}{n^{3}}>0, \forall n \in \mathbb{N}(n \geq 2) \ L=+\infty \text { (3) }\end{array}$

THPT Phan Đình Phùng - Đề thi giữa kì 2 (CT) 20-21 - Q. Ba Đình - Tp. Hà Nội - MĐ 5572