Integration by Substitution - (5) : ExamSolutions

[Sp3LLc4sT3R]

I love you man. This was great!

[naruto2710]

have any vids on intergrating natural logs In

[ExamSolutions]

@naruto2710 Yes - look under integration by parts.

[twidogimbo]

Hi there, when you integrate e^3x^2 why don't you divide by 6x (the differential of 3x^2) ? so, that the final answer is 5e^3x^2/ 12x?

Thanks :)

[ExamSolutions]

@twidogimbo This is a common mistake as you are only allowed to divide by a constant. 6x is not a constant. If you try differentiating 5e^3x^2/ 12x you will not get e^3x^2 which you should if you were correct. Try it. It is the best way of appreciating these concepts. You will need to use the quotient rule.

[Darkassasing]

nice, videos helps me a lot with my calc class XD

[urdream8]

please I need an urgent help

did any one know how to integrate EXP[ x^4 + x ] 

I need it in my programm pleaaaaaaaaaaaassssssssssse help

[summerin115]

@urdream8 integration e^x^4 * e^x , then you use itegration by u subsitution , you put u=e^x , you'll end up having integration exp x^u du = exp^x^4 +C

[ExamSolutions]

Try it by parts and it is extreemly awkward.. By parts works well for axe^bx types

[101BananaSplit]

Hi, I'd just like to thank you for the help these videos you made gave me. I managed to achieve an A at A level maths thanks to them. You are a great teacher, thanks sooo much :)