Phương pháp nào sau đây thường được sử dụng để khử dạng giới hạn vô định của phân thức:

Chia cả tử và mẫu cho biến số có bậc cao nhất.

Chia cả tử và mẫu cho biến số có bậc thấp nhất.

Nhân biểu thức liên hợp.

Cho lim ⁡ u n = a , lim ⁡ v n = b \lim u_n=a,\lim v_n=b lim u n = a , lim v n = b . Mệnh đề nào đúng trong các mệnh đề sau?

a + b = lim ⁡ u n + lim ⁡ v n a+b=\lim u_n+\lim v_n a + b = lim u n + lim v n

lim ⁡ u n + lim ⁡ v n = lim ⁡ u n . lim ⁡ v n \lim u_n+\lim v_n=\lim u_n.\lim v_n lim u n + lim v n = lim u n . lim v n

lim ⁡ u n v n = lim ⁡ u n lim ⁡ v n \lim\frac{u_n}{v_n}=\frac{\lim u_n}{\lim v_n} lim v n u n = lim v n lim u n

lim ⁡ u n = a \lim\sqrt{u_n}=\sqrt{a} lim u n <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z"> = a <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

GIỚI HẠN DÃY SỐ

Authored by Thắng Nguyễn Đình

Mathematics

11th Grade

Used 3+ times

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