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ahhh got it now! thnx for the help :)

can u elaborate a bit more please? i can't see where to go.. thanx for ur help anyway :)

$For n = 1,2,3,..., let s_{\text{n}} = 1 + \sum_{r=1}^{n} \frac{1}{r!}$ $(a) Prove by mathematical induction that e - s_{\text{n}} = e\int_{0}^{1}\frac{x^n}{n!}e^{ -x}dx $(b) From (a), deduce that 0 < e - s_{\text{n}} < \frac{3}{(n+1)!}$ $ for n = 1,2,3,.... . [Remember that e < 3 and e^{ -x}...

i can do parts a),b) and c) but can't do part d) the upside down ! signs are < signs.. i'm not really good at using latex

english advanced: =75/161 math ext 1: =3/95 math ext 2: =2/42 physics: =2/52 chemistry: =4/47 school is ranked 31st

3u maths: 100% 4u maths: 90% hav a small fraction of mechanics and harder 3u to go chemistry: 65% almost finished CFCs physics: 65% finished the photoelectric effect english: 50% finished module A

99+ for sure i might even think 99.7 is possible

like: MX1,MX2, chem, phys dislike: adv eng by far

something i would also like to know

most of the time enthalpy change is measured in kJ/mol. dont take my word for it but

donno if im right but a neutralisation reaction is a proton transfer. so when hydrochloric acid reacts with potassium hydroxide, so a hydrogen ion from the hydrochloric acid is transferred to the hydroxide ion of the potassium hydroxide. this is what causes the change in enthalpy. overall...

your questions require you to find the tangent/normal so basically for these questions you need to know how to implicitly differentiate. so for example a) 2x/25 + (2y/9)(dy/dx) = 0 dy/dx = (-9x)/(25y). to be parallel to y = 2x, the gradient of tangent = 2. let dy/dx = 2 (-9x)/(25y) = 2 x =...

i think around may

i got 9/15. everyones really clumped together for english, and im pretty sure this will be my worst english mark cuz im really hopeless at speeches.

hey can u guys give an estimate please? school rank 30 (expected to go up) advanced english: 89/162 3u maths: 3/100 4u maths: 5/40 physics: 2/45 chemistry: 2/45 thanks :D

most times i sleep from 10:30pm to 6:30am

i'm guessing around 80..

45/50 :D ranked 4/40something

agreed, had 5 bloody ten markers in my first HSC assessment. and all of them were like "assess the significance of the manhattan project to society. 10 marks"

the first one is clockwise and the second one is anticlockwise above the real axis its the opposite under the real axis. they hav the same magnitude but