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yep ah... i dont think that is clear enough for me lol To be clear, A = {n, s, w} P(A) = blah (from above) Therefore, A U P(A) = {empty set, n, s, w, {n}, {s}, {w}, {n,s}, {n,w}, {s,w}, {n,s,w}} P(A U P(A)) = 2^(|A U P(A)|) = 2^11

It is obvious, but write out proper answers to prepare for test

For question 1, part (ii), you need to give reasons why it is T/F

Man, you just need to convert words into a beautiful diagram Once that is done, everything will be clear

OK, I'll need to ask my tutor about that Thanks, very helpful :)

Yes yes

Hi, can someone please check my working out? :) With g : R -> R defined by g(x) = x3 - x + 1 a) What is the range of f? b) Is f onto? Explain. c) Is f one-to-one? Explain. My working: let E mean 'is an element of' a) (-∞, ∞) b) Method 1: Draw x3 - x and shift it 1 unit up. Looking at the...

Re: HSC 2014 4U Marathon So we draw a diagram Look at vector AB Now vec(AC)/vec(BC) = alpha/beta (v-z)/(w-v) = alpha/beta v(beta) - z(beta) = (w)alpha - (v)alpha v(alpha + beta) = (w)alpha + z(beta) v = (bz+aw)/(a+b) as required!!!

\int f'(x)e^{f(x)}dx = e^{f(x)}+C Or just use integration by substitution, by letting u = x^2 +3 Basically the same thing... (you prove the top thing by doing u = f(x) and forward on)

Just to quickly bump this thread in-case squar3root doesnt see this: BE CAREFUL WITH QUESTION 1, TAKE AS LONG AS YOU NEED. IF YOU GET SOMETHING WRONG, YOU LOSE A MARK ^well.. just in-case if you didn't read the instructions in question 1 or if your short-term memory just malfunctions and you...

yeh boi, very easy (pendulum) - just use as much common sense as you can

hahahahaah lopllol lmao rofllmaoaooaoaoaoaoao lololol looo lo lol!!!!!!!!!!!!!!!!!!!!!

You are NOT an idiot An idiot would accept the fact that blah = blah

This guy..... "I just rushed through my other 4 remaining ones" 4 x 6 = 24

H2SO4 + 2NaOH -> Na2SO4 + 2H2O You need 2 moles of sulfuric acid to neutralise 1 mole of sodium hyroxide n(H2SO4) : n(NaOH) = 1 : 2 n(H2SO4)/n(NaOH) = 1/2 2 x n (sulfuric) = n (sodium hydro) (cross multiply)

MAPLETA The test is so easy if you understand the basics There is like differentiation with application of chain rule, polynomial remainder/factor theorem, solving inequalities and many more It is all SIMPLE