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I was just doing a past paper, and I noticed that in the solutions they found the max-min of a function by using the square of the function? Like, you needed to find the value of t which maximises f(t) but then instead of finding df(t)/dt, they used d(f(t))^2/dt can someone explain the...

These are rough guesses not 100% sure lele school rank: top 10 english advanced: 28/140 2u maffs 1/70 modern history 3/29 legal studies 3/22 physics 3/65 (rip) history extension 1/9

Anybody else following/watching playoffs? My money (figuratively) is on a Cavs/Spurs finals Watching Cavs/Pistons G4 atm cavs gonna sweep :haha:

Any recommendations? I'm primarily looking for books on self-development in general (but especially regarding finance, real estate, investment - making money basically ahah) That being said, any book(preferably non-fiction) that about anything that is life changing-level worth reading and...

$Q. Solve $ \left | 1 - |x| \right | \geq 1 $Could someone help me with this? I understand the cases and stuff, and it works out to: $ x\ge 0,\quad x\le 0,\quad x\le -2,\quad x\ge 2 $What I don't get is how you resolve all of these, like what is the rule/logic? I thought the first two...

Can someone compute this lol and confirm I'm not going crazy In the solutions the answer comes out to 5/4, I have no idea what they did It's such a simple integral too... \int _{ -1 }^{ 0 }{ (3x+2)^{ 3 } } dx

Can someone explain to me what's going on in the third last line and an example of it

Just a question that came to me while I was writing notes If resistance in a conductor causes electrical energy to turn into heat energy and when a conductor is heated it's resistance increases, wouldn't this be like an infinite loop if you tried to run electricity through a circuit in a...

Having issues with a question from the Jacaranda textbook, the answer given is 115,000m and I (eventually) got 114,665.56m (Jacaranda tends to round things randomly?) but still not sure if I'm doing it correctly. Q. A coastal defence cannon fires a shell at 45 degrees from the top of a 50.0 m...