a: \(y'=\left(x^2\right)'+\left(3x\right)'-\left(6x^6\right)'+\left(\dfrac{2x-3}{x-1}\right)'\)

\(=2x+3-6\cdot6x^5+\dfrac{\left(2x-3\right)'\left(x-1\right)-\left(2x-3\right)\left(x-1\right)'}{\left(x-1\right)^2}\)

\(=-36x^5+2x+3+\dfrac{2\left(x-1\right)-2x+3}{\left(x-1\right)^2}\)

\(=-36x^5+2x+3+\dfrac{1}{\left(x-1\right)^2}\)

b: \(\left(\sqrt{2x^2-3x+1}\right)'=\dfrac{\left(2x^2-3x+1\right)'}{2\sqrt{2x^2-3x+1}}\)

\(=\dfrac{4x-3}{2\sqrt{2x^2-3x+1}}\)

\(y'=3\cdot2x-4+\dfrac{4x-3}{2\sqrt{2x^2-3x+1}}\)

\(=6x-4+\dfrac{4x-3}{2\sqrt{2x^2-3x+1}}\)

c: \(\left(\sqrt{4x^2-3x+1}\right)'=\dfrac{\left(4x^2-3x+1\right)'}{2\sqrt{4x^2-3x+1}}\)

\(=\dfrac{8x-3}{2\sqrt{4x^2-3x+1}}\)

\(y'=\left(\sqrt{4x^2-3x+1}\right)'-4'=\dfrac{8x-3}{2\sqrt{4x^2-3x+1}}\)

a. \(y'=\dfrac{-1}{\left(x-1\right)}\)

b. \(y'=\dfrac{5}{\left(1-3x\right)^2}\)

c. \(y=\dfrac{\left(x+1\right)^2+1}{x+1}=x+1+\dfrac{1}{x+1}\Rightarrow y'=1-\dfrac{1}{\left(x+1\right)^2}=\dfrac{x^2+2x}{\left(x+1\right)^2}\)

d. \(y'=\dfrac{4x\left(x^2-2x-3\right)-2x^2\left(2x-2\right)}{\left(x^2-2x-3\right)^2}=\dfrac{-4x^2-12x}{\left(x^2-2x-3\right)^2}\)

e. \(y'=1+\dfrac{2}{\left(x-1\right)^2}=\dfrac{x^2-2x+3}{\left(x-1\right)^2}\)

g. \(y'=\dfrac{\left(4x-4\right)\left(2x+1\right)-2\left(2x^2-4x+5\right)}{\left(2x+1\right)^2}=\dfrac{4x^2+4x-14}{\left(2x+1\right)^2}\)

2.

a. \(y'=4\left(x^2+x+1\right)^3.\left(x^2+x+1\right)'=4\left(x^2+x+1\right)^3\left(2x+1\right)\)

b. \(y'=5\left(1-2x^2\right)^4.\left(1-2x^2\right)'=-20x\left(1-2x^2\right)^4\)

c. \(y'=3\left(\dfrac{2x+1}{x-1}\right)^2.\left(\dfrac{2x+1}{x-1}\right)'=3\left(\dfrac{2x+1}{x-1}\right)^2.\left(\dfrac{-3}{\left(x-1\right)^2}\right)=\dfrac{-9\left(2x+1\right)^2}{\left(x-1\right)^4}\)

d. \(y'=\dfrac{2\left(x+1\right)\left(x-1\right)^3-3\left(x-1\right)^2\left(x+1\right)^2}{\left(x-1\right)^6}=\dfrac{-x^2-6x-5}{\left(x-1\right)^4}\)

e. \(y'=-\dfrac{\left[\left(x^2-2x+5\right)^2\right]'}{\left(x^2-2x+5\right)^4}=-\dfrac{2\left(x^2-2x+5\right)\left(2x-2\right)}{\left(x^2-2x+5\right)^4}=-\dfrac{4\left(x-1\right)}{\left(x^2-2x+5\right)^3}\)

f. \(y'=4\left(3-2x^2\right)^3.\left(3-2x^2\right)'=-16x\left(3-2x^2\right)^3\)

a.

\(y'=\dfrac{3}{cos^2\left(3x-\dfrac{\pi}{4}\right)}-\dfrac{2}{sin^2\left(2x-\dfrac{\pi}{3}\right)}-sin\left(x+\dfrac{\pi}{6}\right)\)

b.

\(y'=\dfrac{\dfrac{\left(2x+1\right)cosx}{2\sqrt{sinx+2}}-2\sqrt{sinx+2}}{\left(2x+1\right)^2}=\dfrac{\left(2x+1\right)cosx-4\left(sinx+2\right)}{\left(2x+1\right)^2}\)

c.

\(y'=-3sin\left(3x+\dfrac{\pi}{3}\right)-2cos\left(2x+\dfrac{\pi}{6}\right)-\dfrac{1}{sin^2\left(x+\dfrac{\pi}{4}\right)}\)

1: \(y'=\dfrac{1}{4}\cdot2x-1=\dfrac{1}{2}x-1\)

2: \(y'=\left(sinx-1\right)'\cdot\left(2x-3\right)+\left(sinx-1\right)\cdot\left(2x-3\right)'\)

\(=\left(cosx\right)\cdot\left(2x-3\right)+\left(sinx-1\right)\cdot2\)

4: \(y'=\dfrac{\left(x-1\right)'\cdot\left(x+3\right)-\left(x-1\right)\cdot\left(x+3\right)'}{\left(x+3\right)^2}\)

\(=\dfrac{x+3-x+1}{\left(x+3\right)^2}=\dfrac{4}{\left(x+3\right)^2}\)

1. \(y'=3x^2\sqrt{x}+\dfrac{x^3-5}{2\sqrt{x}}=\dfrac{7x^3-5}{2\sqrt{x}}\)

2. \(y'=3x^5+\dfrac{3}{x^2}+\dfrac{1}{\sqrt{x}}\)

3. \(y'=2-\dfrac{2}{\left(x-2\right)^2}\)

a: \(\lim\limits_{x\rightarrow2^+}\dfrac{\sqrt{x-2}+1}{x^2-3x+2}=+\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow2^+}\sqrt{x-2}+1=\sqrt{2-2}+1=1>0\\\lim\limits_{x\rightarrow2^+}x^2-3x+2=\lim\limits_{x\rightarrow2^+}\left(x-1\right)\left(x-2\right)=0\end{matrix}\right.\)

=>x=2 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{\sqrt{x-2}+1}{x^2-3x+2}\)

b: \(\lim\limits_{x\rightarrow-5^+}\dfrac{\sqrt{5+x}-1}{x^2+4x}=\dfrac{\sqrt{5-5}-1}{\left(-5\right)^2+4\cdot\left(-5\right)}=\dfrac{-1}{25-20}=\dfrac{-1}{5}\)

=>x=-5 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{\sqrt{5+x}-1}{x^2+4x}\)

\(\lim\limits_{x\rightarrow\left(-4\right)^+}\dfrac{\sqrt{5+x}-1}{x^2+4x}\)

\(=\lim\limits_{x\rightarrow\left(-4\right)^+}\dfrac{5+x-1}{\left(\sqrt{5+x}+1\right)\left(x^2+4x\right)}=\lim\limits_{x\rightarrow\left(-4\right)^+}\dfrac{x+4}{\left(\sqrt{5+x}+1\right)\cdot x\left(x+4\right)}\)

\(=\lim\limits_{x\rightarrow\left(-4\right)^+}\dfrac{1}{x\left(\sqrt{5+x}+1\right)}=\dfrac{1}{\left(-4\right)\cdot\left(\sqrt{5-4}+1\right)}=\dfrac{1}{-8}=-\dfrac{1}{8}\)

=>x=-4 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{\sqrt{5+x}-1}{x^2+4x}\)

\(\lim\limits_{x\rightarrow0^+}\dfrac{\sqrt{5+x}-1}{x^2+4x}=+\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow0^+}\sqrt{5+x}-1=\sqrt{5+0}-1=\sqrt{5}-1>0\\\lim\limits_{x\rightarrow0^+}x^2+4x=0\end{matrix}\right.\)

=>Đường thẳng x=0 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{\sqrt{5+x}-1}{x^2+4x}\)

c: \(\lim\limits_{x\rightarrow0^+}\dfrac{5x+1-\sqrt{x+1}}{x^2+2x}\)

\(=\lim\limits_{x\rightarrow0^+}\dfrac{\dfrac{5x+1-x^2-2x-1}{5x+1+\sqrt{x+1}}}{x\left(x+2\right)}\)

\(=\lim\limits_{x\rightarrow0^+}\dfrac{-x^2+3x}{\left(5x+1+\sqrt{x+1}\right)\cdot x\left(x+2\right)}\)

\(=\lim\limits_{x\rightarrow0^+}\dfrac{-x\left(x-3\right)}{x\left(x+2\right)\left(5x+1+\sqrt{x+1}\right)}\)

\(=\lim\limits_{x\rightarrow0^+}\dfrac{-x+3}{\left(x+2\right)\left(5x+1+\sqrt{x+1}\right)}=\dfrac{-0+3}{\left(0+2\right)\left(5\cdot0+1+\sqrt{0+1}\right)}\)

\(=\dfrac{3}{2\cdot\left(6+1\right)}=\dfrac{3}{14}\)

=>x=0 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{5x+1-\sqrt{x+1}}{x^2+2x}\)

\(\lim\limits_{x\rightarrow\left(-2\right)^+}\dfrac{5x+1-\sqrt{x+1}}{x^2+2x}\) không có giá trị vì khi x=-2 thì căn x+1 vô giá trị

=>Đồ thị hàm số \(y=\dfrac{5x+1-\sqrt{x+1}}{x^2+2x}\) không có tiệm cận đứng

d: \(\lim\limits_{x\rightarrow0^+}\dfrac{\sqrt{4x^2-1}+3x^2+2}{x^2-x}\) không có giá trị vì khi x=0 thì \(\sqrt{4x^2-1}\) không có giá trị

\(\lim\limits_{x\rightarrow1^+}\dfrac{\sqrt{4x^2-1}+3x^2+2}{x^2-x}\)

\(=+\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow1^+}\sqrt{4x^2-1}+3x^2+2=\sqrt{4-1}+3\cdot1^2+2=5+\sqrt{3}>0\\\lim\limits_{x\rightarrow1^+}x^2-x=0\end{matrix}\right.\)

=>x=1 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{\sqrt{4x^2-1}+3x^2+2}{x^2-x}\)

a/ \(y=\left(x^3-3x\right)^{\dfrac{3}{2}}\Rightarrow y'=\dfrac{3}{2}\left(x^3-3x\right)^{\dfrac{1}{2}}\left(x^3-3x\right)'=\dfrac{3}{2}\left(3x^2-3\right)\sqrt{x^3-3x}\)

b/ \(y'=5\left(\sqrt{x^3+1}-x^2+2\right)^4\left(\sqrt{x^3+1}-x^2+2\right)'=5\left(\sqrt{x^3+1}-x^2+2\right)^4\left(\dfrac{3x^2}{\sqrt{x^3+1}}-2x\right)\)c/ 

\(y'=14\left(x^6+2x-3\right)^6\left(x^6+2x-3\right)'=14\left(x^6+2x-3\right)^6\left(6x^5+2\right)\)

d/ \(y=\left(x^3-1\right)^{-\dfrac{5}{2}}\Rightarrow y'=-\dfrac{5}{2}\left(x^3-1\right)^{-\dfrac{7}{2}}\left(x^3-1\right)'=-\dfrac{15x^2}{2\sqrt{\left(x^3-1\right)^7}}\)

a: \(\lim\limits_{x\rightarrow3}\dfrac{x+3}{x^2-9}=+\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow3}x+3=3+3=6\\\lim\limits_{x\rightarrow3}x^2-9=0\end{matrix}\right.\)

=>x=3 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x+3}{x^2-9}\)

\(\lim\limits_{x\rightarrow-3}\dfrac{x+3}{x^2-9}=\lim\limits_{x\rightarrow-3}\dfrac{1}{x-3}=\dfrac{1}{-3-3}=-\dfrac{1}{6}\)

=>x=-3 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x+3}{x^2-9}\)

b: \(\lim\limits_{x\rightarrow5}\dfrac{x-5}{x^2-25}=\lim\limits_{x\rightarrow5}\dfrac{1}{x+5}=\dfrac{1}{5+5}=\dfrac{1}{10}\)

=>x=5 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x-5}{x^2-25}\)

\(\lim\limits_{x\rightarrow-5}\dfrac{x-5}{x^2-25}=-\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow-5}x-5=-5-5=-10< 0\\\lim\limits_{x\rightarrow-5}x^2-25=0\end{matrix}\right.\)

=>x=-5 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x-5}{x^2-25}\)

c: \(\lim\limits_{x\rightarrow1}\dfrac{x^2-4x+3}{x^2-1}=\lim\limits_{x\rightarrow1}\dfrac{\left(x-1\right)\left(x-3\right)}{\left(x-1\right)\left(x+1\right)}\)

\(=\lim\limits_{x\rightarrow1}\dfrac{x-3}{x+1}=\dfrac{1-3}{1+1}=\dfrac{-2}{2}=-1\)

=>x=1 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x^2-4x+3}{x^2-1}\)

\(\lim\limits_{x\rightarrow-1}\dfrac{x^2-4x+3}{x^2-1}=+\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow-1}x^2-4x+3=\left(-1\right)^2-4\cdot\left(-1\right)+3=8>0\\\lim\limits_{x\rightarrow-1}x^2-1=0\end{matrix}\right.\)

=>x=-1 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x^2-4x+3}{x^2-1}\)

d: \(\lim\limits_{x\rightarrow3}\dfrac{x^2-3x-4}{x^2-2x-3}=-\infty\) vì \(\left\{{}\begin{matrix}\lim\limits_{x\rightarrow3}x^2-3x-4=3^2-3\cdot3-4=-4< 0\\\lim\limits_{x\rightarrow3}x^2-2x-3=0\end{matrix}\right.\)

=>x=3 là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x^2-3x-4}{x^2-2x-3}\)

\(\lim\limits_{x\rightarrow-1}\dfrac{x^2-3x-4}{x^2-2x-3}=\lim\limits_{x\rightarrow-1}\dfrac{\left(x-4\right)\left(x+1\right)}{\left(x-3\right)\left(x+1\right)}\)

\(=\lim\limits_{x\rightarrow-1}\dfrac{x-4}{x-3}=\dfrac{-1-4}{-1-3}=\dfrac{5}{4}\)

=>x=-1 không là tiệm cận đứng của đồ thị hàm số \(y=\dfrac{x^2-3x-4}{x^2-2x-3}\)