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what courses are there available? anything combined with commerce?

is permutations and combinations part of 4unit? because i cant find anything about it in cambridge/foundation/excel :(

x^3+3x^2+2=0 has roots a, b, c find the equation with roots : a+1/a, b+1/b, c+1/c

(i) if z = x+iy and z'= 1+1/z, obtain an expression for z' in the form x'+iy', and hence express each of x' and y' in terms of x and y. (ii) find an algebraic relation between x' and y' when z has constant @ dont worry too much about (i) but im really confused about (ii) i had a go...

say you got factorise z^5-1 and then prove : cos(2pi/5) + cos(4pi/5) = -1/2 instead of using the long method of equating the co-efficients on both sides to prove the second part i found this other method in some other textbook where cos(2kpi/n) =[ w^k+w^(n-k) ]/2 anyway whats the...

a friend sent me this: part (i) show that: sum of series n E (z+z^2+......z^k) = nz/(1-z) - z^2(1-z^n)/(1-z)^2 k=1 part (ii) let z= cos@+isin@, where 0<@<2pi deduce that n E (sin@+sin2@...........+sink@) k=1 = ((n+1)sin@ - sin(n+1)@)/4sin^2 (@/2) you may...

yeah its coming soonish so whats everyone gona do? study like crazy? i got exams week 2 back as well can someone share their holiday studying info with me :)

i do business, eco and 4 maths and english advanced at school say i get band 6 for eco, bus and maths what would be a lowest score i can get in english to still be 99+? and one more thing i've heard some bad things about business studies from heaps of people, but my teacher insists that...