Recent content by echelon4

i used the hint and divided the pol by x^2, and then used x=cis@ , and by using X^n+X^(-n)= 2cosn@ x=-1/3 + [(squareroot8)i]/3, x=-1/3 - [(squareroot8)i]/3 x=1/2 + [(sqaureroot3)/2]i , x=1/2 - [(sqaureroot3)/2]i

(3x^2 + 3)(x^2 + 1)=3x^4 + 6x^2 + 3 and not the 3x^4 + 4x^2 + 3 you were looking for

what does that L sign mean?

A point is moving in a circle. Prove that it's angular velocity about the centre of the circle is double it's angular velocity about any fixed point on the circumference. THanks in advanced

11!/5!.6! ???

Here's the solution for q5. It's a bit messy. Donno if there's an easier way though..... Sorry bout the size of the picture, i donno how to scan it properly...

been a while since i did parametrics. Here goes.... Sub the t's into x=2at, y=at^2 the two points are: P(6a, 9a) Q(-2a/3, a/9) Use the two points equation. (x-x1)/(y-y1)=(x2-x1)/(y2-y1) comes out to be 4x-3y+3=0 i think......

I want to know what particle accelerators do but can't seem to find anything anywhere! I've been searching on this forums, but the answers are very vague. My question is what do particle accelerators tell us about the structure/ behaviour matter? How do they do this? I've seen answer like...

I don't quite see why Kozintsev's version is Marxist. Could someone explain? Also, is there a name for the reading where someone gains insight after turmoil? What is it? Thanks

I'm asked to explain my 'reading' of King lear in a school assessment, but i still don't fully understand what a reading is. For instance, what is the difference between a reading and a theme, or a thesis? Could someone please explain, and maybe provide some examples of readings? Thanks in...

kool, thnx. Next time i'll be sure to search the forum beforehand.

came across a confusing question. NO idea how to work it out. "a tank contains 100 litres of brine whose concentration is 3greams/litre. Three litres of brine whose concentration is 2grams/litre flow into the tank each minute and at the same time 3 litres of mixture flow out each minute a)...

Can anyone explain how to do these 2 questions? "An insulated lithium surface is irradiated with light of requency 7 x 10^14 Hz and photoelectrons are emitted until it acquires a positive potential of 0.7v. Calculate the work function of lithium in eV. Take h=6.6 x 10^-34 and e=1.6 x 10^-19"...

I can't seem to get the right answer for this question: The base of a certain solid is the region bounded by the curve y=x^2 and the line y=x. Cross sections of this solid by planes perpendicular to the x-axis are squares. Find the volume of the solid. I keep getting the answer as 2/5, but...

I've been studying BNW, and I realise that brave new world's characters are references to people at the time the book was written.e.g Lenina Crowne-Vladimir Lenin Bernard Marx-Karl Marx etc their names are alike, But what i don't understand is what similarities are between the characters...