# Math Help - Intergration....plz help

1. ## Intergration....plz help

Intergrate....

1. x^5-2x+5 diveded by x^3 dx
2. √x (1+√x)^3 dx
3. (1-3x)^9 dx
4. sin2xcosxdx
5. x + 2x^3 diveded by (x^4 + x^2)^3 dx

2. Originally Posted by sweetchocolat113
1. x^5-2x+5 diveded by x^3 dx
$(x^5-2x+5)/x^3 = x^2 - 2x^{-2} + 5x^{-3}$. Now integrate each term.
2. √x (1+√x)^3 dx
Let $\mu = 1+\sqrt{x}$.
3. (1-3x)^9 dx
Let $\mu = 1-3x$
4. sin2xcosxdx
Double angle, $2\sin x\cos^2 x$ and let $\mu = \cos x$.
5. x + 2x^3 diveded by (x^4 + x^2)^3 dx
Let $\mu = x^4+x^2$.

3. ## Intergrals,....

can u please work out them completely so i can have an idea what to do?

4. Do you mean "Can you please work them out completely so I can copy the work and turn it in as my own?"

ThePerfectHacker has given you the all of the problems you have asked, meaning all the thought required has been done for you. Now all you have to do is pretend to be computer and go through the algorithm of integrating basic functions.

tru