\(=lim\left(\sqrt{4n^2+2n}-2n+n-\sqrt[3]{n^3+2n-1}+4\right)\)
\(=lim\left(\frac{2n}{\sqrt{4n^2+2n}+2n}+\frac{-2n+1}{\sqrt[3]{\left(n^3+2n-1\right)^2}+n\sqrt[3]{n^3+2n-1}+n^2}+4\right)\)
\(=lim\left(\frac{2}{\sqrt{4+\frac{2}{n}}+2}+\frac{-2+\frac{1}{n}}{\sqrt[3]{\left(n^{\frac{3}{2}}+2.n^{-\frac{1}{2}}-n^{-\frac{3}{2}}\right)}+\sqrt[3]{n^3+2n-1}+n}+4\right)\)
\(=\frac{2}{2+2}+0+4=\frac{9}{2}\)
Tính các giới hạn sau
1,Lim\(\left(\dfrac{2n^3}{2n^2+3}+\dfrac{1-5n^2}{5n+1}\right)\)
2,a,Lim\(\left(\sqrt{n^2+n}-\sqrt{n^2+2}\right)\)
b,Lim\(\dfrac{\sqrt{n^4+3n-2}}{2n^2-n+3}\)
c,Lim\(\dfrac{\sqrt{n^2-4n}-\sqrt{4n^2+1}}{\sqrt{3n^2+1}-n}\)
Tìm các giới hạn sau:
a) \(lim\left(\sqrt{4n+1}-2\sqrt{n}\right)\)
b) \(lim\left(\sqrt{n^2+2n}-\sqrt{n^2-2n}-n\right)\)
c) \(lim\left(\sqrt{9^n-3^n}-4^n\right)\)
d) \(lim\left(3n^3+2n^2+n\right)\)
tính các giới hạn sau:
a) lim (3n2+n2-1)
b)lim \(\dfrac{n^3+3n+1}{2n-n^3}\)
c) lim \(\dfrac{-2n^3+3n+1}{n-n^2}\)
d) lim \(\left(n+\sqrt{n^2-2n}\right)\)
e) lim \(\left(2n-3.2^n+1\right)\)
f) lim \(\left(\sqrt{4n^2-n}-2n\right)\)
g) lim \(\left(\sqrt{n^2+3n-1}-\sqrt[3]{n^3-n}\right)\)
Tính các giới hạn sau:
\(lim\sqrt{n}\left(\sqrt{n+1}-n\right)\)
\(lim\dfrac{\sqrt{4n^2+1}+2n-1}{\sqrt{n^2+4n+1}+n}\)
Tìm các giới hạn sau:
\(a,lim\left(\sqrt{4n^2+5n}-2n\right)\)
\(b,lim\left(\sqrt{2n+1}-\sqrt{n}\right)\)
Tìm các giới hạn sau:
a) \(lim\left(4^n-3^n\right)\)
b) \(lim\left[\left(2^n+1\right)^2-4^n\right]\)
c) \(lim\left(\sqrt{2n^5-3n^2+11}-n^3\right)\)
d) \(lim\left(\sqrt{2n^2+1}-\sqrt{3n^2-1}\right)\)
e) \(lim\sqrt{n^2+3n\sqrt{n}+1}-n\)
Tìm các giới hạn sau:
a) \(lim\sqrt[3]{-n^3+2n^2-5}\)
b) \(lim\dfrac{1}{\sqrt{n+1}-\sqrt{n}}\)
c) \(lim\left(\dfrac{1}{n+1}-n\right)\)
d) \(lim\left(\dfrac{2n^2-1}{n+1}-2n\right)\)
e) \(lim\dfrac{2n^3+n^2-3n+1}{2-3n}\)
Tìm các giới hạn sau:
\(a,lim\dfrac{\sqrt{n^2+n-1}-n}{2n+3}\)
\(b,lim\left(\sqrt[3]{n^3+1}+\sqrt{n^2+n}-2n\right)\)
Tìm các giới hạn sau:
\(a,lim\dfrac{\sqrt{n^2+n-1}-n}{2n+3}\)
\(b,lim\left(\sqrt[3]{n^3+1}+\sqrt{n^2+n}-2n\right)\)
