\(\lim\sqrt{\dfrac{3^n+2.2^n}{sin^n50^0+9.3^n}}=\lim\sqrt{\dfrac{1+2\left(\dfrac{2}{3}\right)^n}{\left(\dfrac{sin50^0}{3}\right)^n+9}}=\sqrt{\dfrac{1}{9}}=\dfrac{1}{3}\)
lim\(\dfrac{2\sqrt{n}-sin\sqrt{n}}{3\sqrt{n+2}+5}\)
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)\(lim\left[n^2\left(\sqrt{n^2+2}-\sqrt{n^2+4}\right)\right]\)
b)lim( \(\dfrac{3}{n-2}-5n\))
c) lim(\(\dfrac{n-1}{\sqrt{3}-n}-\dfrac{4}{2^{-n}}\))
d) \(lim\left(\dfrac{n^2-4}{n-2}-\dfrac{3n^2+4}{n}\right)\)
e) \(lim\dfrac{\sqrt{n^2+1}-n\sqrt{5}}{\sqrt{n^2+1}+n\sqrt{5}}\)
Tìm các giới hạn sau:
\(a,lim\dfrac{\sqrt[3]{n^3+1}-3n}{\sqrt{n^2+n+1}}\)
\(b,lim\dfrac{n\sqrt{1+2+3+...+2n}}{3n^2+n-2}\)
Tìm giới hạn dãy số :
\(a,lim\dfrac{5n+1}{2n}\\ b,lim\dfrac{6n^2+8n+1}{5n^2+3}\\ c,lim\dfrac{3^n+2^n}{4.3^n}\\ d,lim\dfrac{\sqrt{n^2+5n+3}}{6n+2}\)
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:
\(a,lim\dfrac{\sqrt{n^2+n-1}-n}{2n+3}\)
\(b,lim\left(\sqrt[3]{n^3+1}+\sqrt{n^2+n}-2n\right)\)
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\(\dfrac{\sqrt{n^2-4n}-\sqrt{4n^2+1}}{\sqrt{3n^2+1}-n}\)
Tính:
a) \(I=lim\dfrac{5^n+2^n}{3^n+4^n}\)
b) \(I=lim\dfrac{\sqrt{n^3+2n}+3n}{n+\sqrt{n^2+1}}\)
c) \(I=lim\left(\sqrt{2n^2+n}-\sqrt{n^2+2n+3}\right)\)
