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Find the equation of the directrix of the following 3y^2=x (shouldn't it be x=1/3)?

Sorry dont quite understand what u mean could u plz expand further ??

http://snag.gy/O5syt.jpg please provide steps dunno how to do

Prove by Induction n * 2^n-1 = (n-1)2^n for all n=>1 Here is my current working, could you please advise on what i am doing wrong or how i can make LHS=RHS(continue from my last line) http://snag.gy/rejma.jpg

Thanks ! :)

How do i deal with the squared ? Solve for 0<= theta <= 360 http://snag.gy/uNLPi.jpg

Ahhh yes, sorry my fault thanks anyway to both of you :)

I think u miss interred the question here is the original Q Find exact value http://snag.gy/jVJNs.jpg

Hi, need help, forgot how to solve... 2(√3/4)/(1/√2) Please provide steps and any tips :) thanks (sqr root sign is alt and 251 on num pad) :)

All the links are broken !! :(

Hey man i saw that u uploaded the Jacaranda Chem prelim as a pdf, could u plzzzzz upload the HSC one as well it would be a life saver !! if you want i can upload to you in exchange any of the following (jacaranda hsc physics, maths grove 2U & ext 1 yr 11 or 12, cambridge 3u yr 11 or 12) i would...

Could some one plz upload the HSC jacaranda CHEM plzzzzzz it would be a life saver !! if you want i can upload to you in exchange any of the following (jacaranda hsc physics, maths grove 2U & ext 1 yr 11 or 12, cambridge 3u yr 11 or 12)

Hi all SD&D'ers Like all of you i too find the modelling tools section of SD&D really daunting so i wanted us to collaborate on a great wiki like page (for everyone to use) of them right here on this thread !! Ill kick things off with my example on Context/Data flow diagrams :)...

Hi everyone, Hypothetical question, just as i was bored with IPT work; I wanted to know what features YOU would like in an app made for ur school.(one that u could use on a smartphone or ipod) Comment with suggestions :D(plz dont be stupid eg. do my homework for me etc)

Anyone who is able to tutor maths ext1 yr 11 student online today or tomorrow (8/sep - 9/sep) please contact me/message me/post on this thread,

i am trying to do the following questions... http://snag.gy/svrSl.jpg http://snag.gy/C7BnV.jpg i am required to write net ionic equations for the above but i am getting confused with where numbers and +ve or -ve ions are meant to be written and where each of them come from Could some one please...

quick question, do all acids contain hydrogen and when writing net ionic equations(for acids and metals) is the hydrogen ion always positive ?

Hi, I am currenty working on a prelim software project it is a website for 11 studentents doing SD&D and it explains the sylabus using vids and then gives them multiple choice quizzes to see how well they are going, althought this is good so far i am looking for a way to make this more...

Sorry i did make a mistake it should be y^2 thx

Could you also help me with this one... determine the greatest value of the function f(y) = 17 + 4y -x^2