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yea but i keep getting a different answer to my textbook.

integrate x/[(x^2+2)(x-3)]

The base of a particular solid is x^2 + y^2 = 4. Find the volume of the solid if every cross-section perpendicular to the x-axis is a parabolic segment with axis of symmetry passing through the x-axis and height the length of its base. (answer = 256/9)

integrate x*sqrt(2x-x^2)

when finding volumes using cylindrical shells, how do you determine the upper and lower limits for the integral? :S

yea it is. i was actually more interested in seeing how other people did it.

Use the method of slicing to find the volume of the solid obtained by rotating the region enclosed within the circle (x-1)^2 + y^2 = 1 about the y-axis.

alright thanks

did you just put 2C so that when you divide everything by 2, you'd end up with just C?

go to hell dirty wizard. xD

integrate (secx)^3

What is the fastest/easiest way to integrate sec(x)? also, what is the integral of: xsecxtanx ?

yup i got that too. the question is an example from Cambridge 4unit. However cambridge's answer was different.

find the integral of x^3/sqrt(x^2+1)

Find the area bounded by the curve y = e^x/(1+e^2x), the x-axis, the y-axis and the ordinate x = 1/2ln3.

14th of October

What are the benefits/advantages of globalisation? :)

ah alright. thanks

I thought the answer would be Fe3+ since its standard reduction potential is 0.77V, whereas Cu2+ has a SRP of 0.34.

Which of the following species is the strongest oxidising agent? a) Cu2+ b) Al3+ c) Fe3+ d) Ca2+ Can someone please give me an in-depth explanation on how what the answer is and why? :S