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k.. k cool thanx.

integrate x^2/(x+1) . when u do it by substitution using u=x+1 and hence converting x^2 to (u-1)^2 and changing du to dx you get -3/2 in the final result. changing the integral to [(x+1)(x-1) +1]/(x+1) and integrating it this way you get a similar result without the -3/2. my question...

... Ill just stick with my effect thing for now. :D :cool: lol

.. sorry i meant page 91 lol and yeah foundations.

I need someone with patel to answer this q. By with the trapezium thing is y a linear function( in terms of h) if its isocles. Does it make a difference if it wasnt isoscles?

.... Yes i've read this too. The light doesnt actually go as fast as 9x10^10 its just a light effect due to caesium gas that makes it appeat faster. The two guys( i think it was two) even said this is not vilolating relativity. Read up :)

oh wait... :mad1: The elementary way is the complex no. way ( what was i thinking) Using cos rule for two triangles ( one triangle has shorter diagnol, the other longer) gives the complex result.

while on the subject... Someone solve this easy problem( well i think its meant to be) A Parralelogram ABCD has Diagnols , length 3 and 5. And One side is 2. Find the adjacent side. I thinkl this is meant to be from the result from complex numbers. The sum of the Square of all the sides...

... I still dont get it .... :( :mad1: :confused: :rolleyes: what is a ? log{tan[x]}= a ? And where is log{tan[x]} coming from?

huh????????/ i get the second one , but the first one... Where does log come in? I(u^n)dn = u^n/(n+1) + C tanx is a constant

... so i didnt make sense to anyone?

.. Oracle i think u have learnt incorrectly . lol If u have sqrt(36) it = + 6 by definition ( |x| = + sqrt(x^2) ) like if u let x^2 = 36 |x| = +sqrt(36)= 6 then x= 6 or x=-6 that might make more sense. I should have said that earlier. lol

... haha sorry, u know i meant hsc

haha haha its q8 from 2000 school certificate.

.. Indicie rules apply for eq's like x^2= 36 x^2= sqrt[(+-6)^2] To the power of a half gives x= +-6 I think

haha haha i was thinking about the same thing today and came up with something interesting. sqrt(x^2) =|x| by definition. I tried to derive it and was pretty succesfull. |z|= sqrt(x^2+y^2) right? YES if z=x or x+0i , hence y=0 Therefore |x|=sqrt(x^2) haha - there...

.. oh yeah , i dont get how the question was solved the easy way. General eq of a circle that passes through the origin? and can u just do all the steps to solving it the easy way?

... Where is Prior tutoring? someone asked me before and i didnt know what he was talking about. LOL

... oh yeah. Since when P moves , the angle subtended from the chord is equal to the angle , the chord subtended in P's other position. This makes it a circle due to the converse theorem of " angles subtended by the same chord or arc are equal in a circle". Right ?

If two complex numbers intersect at a moving point P with the angle made by the intersection always being the same , how does that make the locus of P( which represents z) a circle ? (or part of a circle , major /minor arc). It seems obvious, but i just want some logic. Im wondering why it...