\(=\lim\limits_{x\rightarrow2}\dfrac{\sqrt{x-1}-1+x^4-3x^3+x^2+4}{\sqrt{2x}-2}=\lim\limits_{x\rightarrow2}\dfrac{\dfrac{x-2}{\sqrt{x-1}+1}+\left(x-2\right)^2\left(x^2+x+1\right)}{\dfrac{2\left(x-2\right)}{\sqrt{2x}+2}}\)
\(=\lim\limits_{x\rightarrow2}\dfrac{\dfrac{1}{\sqrt{x-1}+1}+\left(x-2\right)\left(x^2+x+1\right)}{\dfrac{2}{\sqrt{2x}+2}}=1\)
Tìm giới hạn:
a, \(\lim\limits_{x\rightarrow2}\dfrac{1-\sqrt{x^2+3}}{-x^2+3x-2}\)
b, \(\lim\limits_{x\rightarrow2}\dfrac{\sqrt{4x-1}+3}{x^2-4}\)
Tính các giới hạn
a) \(\lim\limits_{x\rightarrow0}\dfrac{\sqrt{x+1}-\sqrt[3]{x-1}}{x}\)
b) \(\lim\limits_{x\rightarrow2}\dfrac{\sqrt[3]{x-3}+\sqrt[4]{2x-3}}{x-2}\)
Cho \(\lim\limits_{x\rightarrow2}\dfrac{f\left(x\right)-32}{x-2}=3\). Tính \(\lim\limits_{x\rightarrow2}\dfrac{\sqrt{3f\left(x\right)+10}+\sqrt[3]{f\left(x\right)-5}-2x-3}{x^2+x-6}\)
Tìm giới hạn:
a, \(\lim\limits_{x\rightarrow-2}\dfrac{\sqrt[3]{2x+12}+x}{x^2+2x}\)
b, \(\lim\limits_{x\rightarrow2}\dfrac{x-\sqrt{x+2}}{x^3-8}\)
Các bạn tính giúp mình mấy câu này với:
1. \(\lim\limits_{x\rightarrow\left(-1\right)-}\dfrac{\sqrt{x^2-3x-4}}{1-x^2}\)
2. \(\lim\limits_{x\rightarrow2^+}\left(\dfrac{1}{x-2}-\dfrac{x+1}{\sqrt{x+2}-2}\right)\)
3. \(\lim\limits_{x\rightarrow+\infty}\dfrac{3x^2-5sin2x+7cos^2x}{2x^2+2}\)
4. \(\lim\limits_{x\rightarrow+\infty}\left(x.sin\left(\dfrac{1}{3x}\right)\right)\)
5. \(\lim\limits_{x\rightarrow0}\dfrac{\sqrt{2x+1}.\sqrt[3]{3x+1}.\sqrt[4]{4x+1}-1}{x}\)
6. \(\lim\limits_{x\rightarrow0}\left(\dfrac{\sqrt{9x+4}-\sqrt[3]{4x^{^2}+8}}{sinx}\right)\)
Biết \(\lim\limits_{x\rightarrow2}\dfrac{f\left(x\right)-3}{x-2}=5\). Tính \(\lim\limits_{x\rightarrow2}\dfrac{\sqrt{f\left(x\right)+6}-\sqrt[3]{x+25}}{x-2}\)
Tính các giới hạn
a) \(\lim\limits_{x\rightarrow+\infty}\dfrac{\sqrt[3]{x^3+2x^2-4x+1}}{\sqrt{2x^2+x-8}}\)
b) \(\lim\limits_{x\rightarrow-\infty}\dfrac{\sqrt{x^2-2x+4}-x}{3x-1}\)
Tính giới hạn
a) \(\lim\limits_{x\rightarrow-\infty}\dfrac{x+3}{3x-1}=\dfrac{1}{3}\)
b) \(\lim\limits_{x\rightarrow-\infty}\dfrac{\sqrt{x^2-2x+4}-x}{3x-1}\)
Tìm giới hạn:
a, \(\lim\limits_{x\rightarrow-2}\dfrac{\sqrt{x^2+5}-3}{x+2}\)
b, \(\lim\limits_{x\rightarrow2}\dfrac{x^2+x-6}{x^2-4}\)
