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Hey all =] Just seeking confirmation on this.. Find the coordinates of the point on the parabola y = 6x²-13x+5 at which the tangent is parallel to the line y+x=4. My working: Equation of line: y = -x + 4 .'. gradient of line = -1 dy/dx of parabola = 12x-13 -1 = 12x - 13 12 = 12x x = 1 sub x...

Okay, in a nutshell, I'm doing 12 units at the moment. 3U English and 3U maths and Software Design are the problem I hate 3U English. I hate Software Design. I like maths. Dropping 3U English + Dropping Software Design = -3 units Therefore I must pick up 4U maths. 10 units with 4U maths in...

2. i) Show that 1/(p^2+pq) + 1/(q^2+pq) = 1/pq I figured this one out, but for the next bit: ii) Hence express 1/5 in the form 1/a + 1/b for some positive integers a and b. What the hell does this mean? >_<

I was just wondering how many of you have a tutor, or whether you'll get one in the future. I've had a private mental debate on the pros/cons of tutors, and the pros pretty much dominate the list. You're paying money for a potentially higher UAI, and when it comes down to it, why not? Discuss. =]

I'm just wondering how I should set out working for a question that asks dy/dx. I use the easy method (dunno what it's called). eg. Find dy/dx for: 2x^3 + x^2 + 3x + 8 f'(x) = 6x^2 + 2x + 3 Do I have to state that I'm using this method or anything else before I answer f'(x)? Ta =]

I've pretty much finished mine - it's a kind of race to the finish. Each time you enter the correct answer, your avatar moves 20 pixels to the right. Each time you get one wrong, it moves 10 pixels to the left. Your goal is to reach the finish line (which is on the right hand of the screen =p)...

Sorry, but I really need to check these answers =P What volume of oxygen is required for the complete combustion of 125mL of butene gas (C4H8) and what volume of CO2 is formed? (All volumes are measured at the same temp. and press.) Since they're all gases at the same temperature and pressure...

Hi all, I'm wondering HOW this answer is achieved. What would ten molecules of N2O3 weigh? I've been told that you get the answer by dividing the molar mass (76) by Avagadro's number, then multiply by ten. If this is correct, can I assume that (Molar Mass / Av's # = weight of 1 molecule)?

Hey, I had taken a break from this site for a while, but now I'm back for a query! I've browsed several threads on this forum and found a common problem in some students - their problems with English. I want to see if there is someone out there who is actually "mastering English". I'm talking...

Hey again >.> This time I'm having trouble with inequalities in extension 1 maths; Q1: Solve x^2 > a^2 ~ I have no idea how to write this down in equation form. Q2: Solve |t+2| + |3t-1| < 5 ~ My working; t+2 + 3t-1 < 5 4t + 1 < 5 4t < 4 t < 1 The answer is -1<t<1 :: how? Ty =]

Hi peoples =] I've been browsing this site for a while now, and I've hit a wall on a permutations+combinations question; Q: Five-letter words are formed without repetition from the letters in "PHYSICAL". How many have the two vowels occurring next to one another? My first guess would be to...