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cant do these 3 questions.. please help~~thankss

These are the multiple choice questions that I'm unsure with.. Please help :( and there is a calculation question that I dont understand as well (q.10) Any help would be appreciated ~~ THANKS!!! 1) Acid Conc (mol/L) pH P 0.01 2 Q 0.05 1...

1) Given that arg(z-1) = 2pi/3 and arg(z+1) = pi/6, express z in mod-arg form. 2) Given that w = (z+2)/z and z moves along the unit circle. Find and describe the locus of w. 3) It is given that z1 and z2 are two complex numbers representing points A and B with |z1|=|z2|=1...

1.) Find r if 12C(3-r) = 12C(10-r) ANS:1 2.) Find the term independent of x ANS:-72 (x- 1/x)^10 (x+ 1/x)^4 3.) In the expansion of (1+3x)^6 + (1+4x)^5 + (1-x)^10 Find the coefficients of x^8 ANS:45 4.) Given (1+px)^n = 1+20x+180x^2+kx^3+other terms involving...

A particle of mass m describes a horizontal circle of radius 0.24m inside a smooth hemispherical bowl of internal radius 0.25m which is held with the rim horizontal. A light string tied to the particle passes through a smooth hole at the bottom of the bowl and supports another particle of mass m...

just want to make sure if i did not get it wrong thanks. 09-10 budget Revenue side: Þ Private health insurance rebate will be reduced for higher income earners. Þ The Medicare Levy Surcharge will also be increased to maintain the incentive for those able to pay for private health insurance...

everywhere is out of stock :(

I couldnt get the second question... up to 2I = integral ln |sec^2日| d日 Is integral ln |sec^2日| d日 = 2sec^2日tan日 / sec^2日 ? thanksss

Given that I(2n+1) = integral (0->1) x^(2n+1) e^(x^2) dx Show that, I (2n+1) = 1/2 e - n I(2n+1) Thanks a lot. And can anyone share their method when dealing with reduction integration? I always struggling with this type of questions.. How do you normally approach it? like.. I can...

1. A particle projected from a point meets the horizontal plane through the point of projectin after travelling a horizontal distance a, and in the course of its trajectory attains a greatest height b above the point of projection. Find the horizontal and vertical components of the velocity in...

A hole of diameter R is drilled through the centre of a solid sphere of diameter 2R. Show that the remaining solid has volume [(sqrt root 3)/2 pi R^3] by using: 1) cylindrical shells method 2) slicing thanks guys

thanks guys

We are asked to find a related text to compare and contrast with the film "Strictly Ballroom" about "Australian Visions" .. Anyone has a good suggestion? What does "Australian Visions" really mean actually :confused::confused: Thanks guys~

Does anyone know how large the difference between their scaling? with a specific example mayb? thanks a lot

Will you actually prepare quite a few topic of extended response before go into exam? erm because, the extended responses play quite an important role in the whole exam. it worth 40marks in ur hsc. if u do good in the essays part, ur whole exam will be >=fine. if u do not that good in that, ur...

Hi this is my first post here, and i really need some advice on dropping subjects. Im currently doing 12units- which are 4umath, esl, economics, physics and chemistry. My school ranking is within the range 50-70 in the state, I only aim UAI 92-93 and then to get 4marks bonus points to study...