Hey Sy123,
Can you please email me with the solutions. Thanks for your time lol
EMIAL: Afghan.4life@hotmail.com
Q1. In how many ways can three groups of three numerals be chosen without replacement from the nine numerals 1,2,3,4,5,6,7,8,9 ?
A) 84
B) 80
C) 504
D) 1680
Q2. In how many ways can a group of three letters be chosen without replacement from the nine letters of the world AUSTRALIA?
A) 14
B) 28
C) 42
D) 84
Q3. In an Argand diagram the vectors OP and OQ represent the complex numbers z and w repectively such that Triangle OPQ is equilateral.
What is an expression for z^2 +w^2.
A) -2zw
B) -zw
c) zw
D) 2zw
Q4. if z^n-1= (z-1)(z-w)(z-w^2)...(z-w^n-2)(z-w^n-1). what is the value of (1-w)(1-w^2)...(1-w^n-2)(1-w^n-1).
A) 0
B) 1
C) n-1
D) n
Q5. if a+B+y=3, 1/a+1/B+1/y=2 and aby=1. what is the value of a^2+B^2+y^2?
A) 1
B) 3
C) 5
D) 7
for question Q5. (a+B+y)^2-2(aby)= 5 is this right or is their another way.