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Question: [3(x+1)] / (x-1) is less than or equal to 2x I was taught to times both sides by the denominator squared. Why does the solution just bring the denominator across to the other side? I have no idea. Can someone explain to me THANKS

So i'm having extreme difficulty trying to do this, hope you can help me out =] (nC0)^2 + (nC1)^2 + (nC2)^2 + ... + (nCn)^2 = (2n)Cn thanks!

Hey guys, Can anybody tell me how to integrate this: sin (ln x) dx It says use integration by part but i have no idea what to let what equal what. Help is appreciated! Cheeerrs~

Hey guys, This is a particular permutation question which annoys me. I use the Cambridge method and get a total different answer to what another textbooks says, cause they have some other way of working it out. I think it was maths in focus, but don't take my word there. So this ISN'T the exact...

Hey all, Was just wondering after trials if going to school is still compulsory (taking into consideration you've finished your course). Like will it add to your usual school attendance, and if it drops below a certain amount of days absent, you don't get your HSC? I heard that you must attend...

Hey guys, For the success one book (i got the 08 version), question 23 in the 2007 paper, is it me or is the answers wrong for it. It asks to draw/write the structural formula for ethyl hexanoate. I looked at the answers given in the back and i think they accidently added an extra carbon in...

Twelve differently coloured beads are arranged around a necklace. How many different arrangements are possible? Is the working out: 11! / 2! If it is why? thanks

Can someone please show me how to integrate: e^sqrt(x) using the substitution u = sqrt(x) Thanks

Is my solution correct? Given P(x) = 4x^3 - 27x + k has a double root. Find possible values for k. P'(x) = 12x^2 - 27 P'(x) = 0 x^2 = 27/12 x= +/- 3/2 P(3/2) = 27/2 - 81/2 + k = 0 P(-3/2) = -27/2 + 81/2 + k = 0 k = 54/2 = 27 k = -54/2 = -27 Help is appreciated.

hey, this might be a very easy question, but i've never encountered it before. How does: inverse tan (2) - inverse tan (1/2) = inverse tan (3/4) Help is appreciated, thanks