Tính các tích phân sau :

a) \(\int\limits^1_0\left(y^3+3y^2-2\right)dy\)

b) \(\int\limits^4_1\left(t+\dfrac{1}{\sqrt{t}}-\dfrac{1}{t^2}\right)dt\)

c) \(\int\limits^{\dfrac{\pi}{2}}_0\left(2\cos x-\sin2x\right)dx\)

d) \(\int\limits^1_0\left(3^s-2^s\right)^2ds\)

e) \(\int\limits^{\dfrac{\pi}{3}}_0\cos3xdx+\int\limits^{\dfrac{3\pi}{2}}_0\cos3xdx+\int\limits^{\dfrac{5\pi}{2}}_{\dfrac{3\pi}{2}}\cos3xdx\)

g) \(\int\limits^3_0\left|x^2-x-2\right|dx\)

h) \(\int\limits^{\dfrac{5\pi}{4}}_{\pi}\dfrac{\sin x-\cos x}{\sqrt{1+\sin2x}}dx\)

i) \(\int\limits^4_0\dfrac{4x-1}{\sqrt{2x+1}+2}dx\)

Hãy chỉ ra kết quả nào dưới đây đúng :

a) \(\int\limits^{\dfrac{\pi}{2}}_0\sin xdx+\int\limits^{\dfrac{3\pi}{2}}_{\dfrac{\pi}{2}}\sin xdx+\int\limits^{2\pi}_{\dfrac{3\pi}{2}}\sin xdx=0\)

b) \(\int\limits^{\dfrac{\pi}{2}}_0\left(\sqrt[3]{\sin x}-\sqrt[3]{\cos x}\right)dx=0\)

c) \(\int\limits^{\dfrac{1}{2}}_{-\dfrac{1}{2}}\ln\dfrac{1-x}{1+x}dx=0\)

d) \(\int\limits^2_0\left(\dfrac{1}{1+x+x^2+x^3}+1\right)dx=0\)

Tính các tích phân sau :

a) \(\int\limits^{\dfrac{1}{2}}_{-\dfrac{1}{2}}\sqrt[3]{\left(1-x\right)^2dx}\)

b) \(\int\limits^{\dfrac{\pi}{2}}_0\sin\left(\dfrac{\pi}{4}-x\right)dx\)

c) \(\int\limits^2_{\dfrac{1}{2}}\dfrac{1}{x\left(x+1\right)}dx\)

d) \(\int\limits^2_0x\left(x+1\right)^2dx\)

e) \(\int\limits^2_{\dfrac{1}{2}}\dfrac{1-3x}{\left(x+1\right)^2}dx\)

g) \(\int\limits^{\dfrac{\pi}{2}}_{-\dfrac{\pi}{2}}\sin3x\cos5xdx\)

Tính các tích phân sau

1.I=\(\int\limits^{\frac{\Pi}{4}}_0\) (x+1)sin2xdx

2.I=\(\int\limits^2_1\frac{x^2+3x+1}{x^2+x}dx\)

3.I=\(\int\limits^2_1\frac{x^2-1}{x^2}lnxdx\)

4. I=\(\int\limits^1_0x\sqrt{2-x^2}dx\)

5.I=\(\int\limits^1_0\frac{\left(x+1\right)^2}{x^2+1}dx\)

6. I=\(\int\limits^5_1\frac{dx}{1+\sqrt{2x-1}}\)

7. I=\(\int\limits^3_1\frac{1+ln\left(x+1\right)}{x^2}dx\)

8.I=\(\int\limits^1_0\frac{x^3}{x^4+3x^2+2}dx\)

9. I=\(\int\limits^{\frac{\Pi}{4}}_0x\left(1+sin2x\right)dx\)

10. I=\(\int\limits^3_0\frac{x}{\sqrt{x+1}}dx\)

Tính :

a) \(\int\limits^2_{-1}\left(5x^2-x+e^{0,5x}\right)dx\)

b) \(\int\limits^2_{0,5}\left(2\sqrt{x}+\dfrac{3}{x^2}+\cos x\right)dx\)

c) \(\int\limits^2_1\dfrac{dx}{\sqrt{2x+3}}\) (đặt \(t=\sqrt{2x+3}\) ) 

d) \(\int\limits^2_1\sqrt[3]{3x^3+4}x^2dx\)  (đặt \(t=\sqrt[3]{3x^3+4}\) )

e) \(\int\limits^2_{-2}\left(x-2\right)\left|x\right|dx\)

g) \(\int\limits^0_1x\cos xdx\)

h) \(\int\limits^{\dfrac{\pi}{2}}_{\dfrac{\pi}{6}}\dfrac{1+\sin2x+\cos2x}{\sin x+\cos x}dx\)

i) \(\int\limits^{\dfrac{\pi}{2}}_0e^x\sin xdx\)

k) \(\int\limits^e_1x^2\ln^2xdx\)

Tính các tích phân sau :

a) \(\int\limits^4_{-2}\left(\dfrac{x-2}{x+3}\right)^2dx\) (đặt \(t=x+3\) )

b) \(\int\limits^6_{-4}\left|x+3\right|-\left|x-4\right|dx\)

c) \(\int\limits^2_{-3}\dfrac{dx}{\sqrt{x+7}+3}\) (đặt \(t=\sqrt{x+7}\) hoặc \(t=\sqrt{x+7}+3\) )

d) \(\int\limits^{\dfrac{\pi}{2}}_0\dfrac{\cos x}{1+4\sin x}dx\)

e) \(\int\limits^2_1\dfrac{x^9}{x^{10}+4x^5+4}dx\) (đặt \(t=x^5\) )

g) \(\int\limits^3_0\left(x+2\right)e^{2x}dx\) 

h) \(\int\limits^5_2\dfrac{\sqrt{4+x}}{x}dx\) (đặt \(t=\sqrt{4+x}\) )

Xét tích phân I=\(\int\limits^{\dfrac{\pi}{2}}_0\dfrac{sin2x}{\sqrt{1+cosx}}dx\). Nếu đặt t=\(\sqrt{1+cosx}\), khẳng định nào dưới đây là đúng?

A. I= \(\int\limits^1_{\sqrt{2}}\dfrac{4t^3-4t}{t}dt\)

B. I= \(\int\limits^1_{\sqrt{2}}\dfrac{-4t^3+4t}{t}dt\)

C. I= \(4\int\limits^{\sqrt{2}}_1\left(t^2-1\right)dt\)

D. I= \(-4\int\limits^{\sqrt{2}}_1\left(t^2-1\right)dt\)