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hey lucas. i think i have done that question. the X on the e is raised to the power of 3 and the -1 is just hanging on the edge. ie e^x^3-1 ie x cubed -1. should be able 2 do it from there

should be easy from there

well the answer to c is found by expanding sin2x=2sinxcosx and the answer to e is found by having sin4x=sin(2x+2x)=sin2xcos2x+sin2xcos2x NB cos2x=cos^2x-sin^2x

do u know what the answers say? i would just like to check b4 i post

???

Could i say that the results are valid as they follow the method, but the method is invalid because it does not take recorded measurements?

could i say that the results obtained are valid, as they follow the method accurately, but the experimental method is invalid as it does not require the measurement of how much (ppm) of each tested ion was present?

anybody? please help

A water sample was taken and the quality of that water was to be tested. The ions present in that water were simply observed rather than recorded as to how many ppm were present. The experiment followed a strict method accurately which simply stated record the observations of the tests. Are the...

ahhh yes. my bad. i see how 2 do it now

First, find the equation. As it is a parabola, it has an x^2 and the final term is 10 as when x=0, y=10. As x=5 satisfies the equation, x^2+ax+10=0. Subbing in and rearranging gives a=-7 Therefore, the equation is x^2-7x+10 Differentiating and rearranging gives z=7/2 is that correct?

Does anyone know what would be some good add. material for the English topic: history and memory?

yeah, it's slightly odd hey. well im doing main sequence stars, so as they emit visible light, and the colour of a star is related to it's surface temperature, i just said that the wavebands r used to predict a star's surface temp and related wavelength to type of EMR emitted. idk what it would...

well that fact is not entirely true. black holes, for example, absorb everything and emit nothing. hence, i am unsure as to their exact waveband as such. and i think the question is more referring to which waveband does it emit most of, so for MSS for example, they emit visible light predominantly.

the question tells u that its valency is 2. it cant get much more basic than that

the wavebands part simply refers to the EM spectrum and which part of it its emissions falls into (wavelengths). if they are visible they obviously fall into the visible light part of the EM spectrum. if they r invisible they obviously emit gamma rays or radio waves etc. 4 the rest of ur...

Re: HSC 2012 Marathon :) is there another way of graphing this other than plotting points and graphing them? (u r still able to determine there is a hole at x=0)

hey guys, my school ranking is approximately 150 my ranks/marks after the half yearly exams are as follows: Maths Ext 2: 2/5 with 83% Maths Ext 1: 2/17 with 98% English Advanced: 15/65 with 80% Physics: 3/37 with 92% Chemistry: 3/28 with 90% Studies of Religion 2: 4/25 with 90% does anyone...

does anyone know of any observations about main sequence stars which have taken place within the last 5 years? and if they do, do they know of how i could access this information? thanks

well if that's all i get i'll need all the luck i can get ;)