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This is for my cousin. He's currently doing his trials and I will post another thread once he gets this results. But for now.... School Rank: Top 7 Physics: 3/90 MX1: 1/130 MX2: 1/62 Eng advanced: 21/146 Chemistry: 4/119 Of course this is subject to change, but if he...

Please help me with this problem

Sketch y = 2^x, then use the fact that the chord AB (where A(a,2^a) and B(b,2^b))lies above the curve to show that the geometric mean of two distinct positive numbers is less than their arithmeitc mean

Hi all. i heard that in the external HSC common paper, there is no such thing as half marks. So your raw mark must be an integer right? Then please explain to me this. For instance, each person in the top ten list is differentiated from another by 1 mark right??? That equates to a difference...

PRove that in general that if P,Q,R and S are four colliear points such that Q divides PR internally in the same ratio as S divides PR externally, then R divides QS internally in the same ratio as P dividies QS externally. I know what I'm supposed to do, but I don't arrive at the answer...