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why did u think of 3x - 2 ?? what does that have to do with anything to do with this question.. the use of substitution is really just to make u see the steps since you are reversing your differentiation and some of the steps can get difficult. eg if you are integrating x using the...

6 is divisible by 24 1/4() + c exact same as what i got..

hey, if your question was infact bracket times the sqaureroot of x then that is the answer. it is possible that your formatting or the answer you have has formatting which is different to mine and kfunk's. but i assure you if this is the integration you gave us then it is correct...

expect to find 1 circle geometry question on your paper.. there always is one (might be in another question totally unrelated to geometry until like Q iv)

haha obviously the first one... no one here coudl do the second one.. without having other knowledge outside the syllabous. ps u will never get this question posted in the hsc anyways unless they give u the substitution (in 3unit that is)

u = 2x^3/2 -1 u' = 3x^1/2 1/3 I u^1/3 du = 1/4 u^4/3 + c = 1/4 (2x^3/2 - 1)^4/3) + c

woah u made a mistake.

yea ofcourse u can use the second method... it will b correct and most importantly it will give you the same answer but wouldn't it be like 10 times longer... ? btw u double posted/

well yea i know but just the solutions in the hsc just start off by assuming 2pi xy dx.... when they ask for cylindrical shells ofcourse and our teacher told us not to quote it even though they quote it...

yea fuck i suck at em too... ummm question (this is for cylindrical shells) can we quote 2Pi xy dx.. my teacher said no but the maths assosiation solutiosn to HSC quotes it and goes on from there.. this really makes the job EXTREMLY EASY (liek 2u)

is this an actual question or did u just think of it to see if it is possible...? if u draw y = x - e^-x and mirror it though y = x it is something like y = x - lnx

i thought someone as nerdy as u in conics would've posted some conics Q's. (not that im complaining about the rest)

depends on ur school really... they could be very well much harder than the hsc (like cssa paper) or ur teacher could have copied past hsc papers... but is it imporant to study for the trial... yes ofcourse.. as important as the hsc?... no

ofcourse... unless they tell u what method to use. eg find the integral by parts. but sometimes they say something like by using similar triangles, or otherwize prove this.. so we can prove it whatever way we want :) even with physics formula's about projectile, they are the same as...

yea because your teacher copied the catholic trial 2003...

wtf is an arctan slide_rule? is that inverse tan tan^-1@

yea it is sorry....

<b>NEW QUESTION LOOK AT ORIGINAL POST</b>

silly... sounds so easy. Why didnt i do that.

what??? how/??