Answer to Question #54790 in Abstract Algebra for Joseph

Question

If R (the set of real number) be the universal set and sets V={yϵR:0< y ≤3} and W={yϵR:2 ≤ y <4 } What is V l
For sets A and B , if A and B are subset of Z (the set of Integer) which of the following relations between the two subset is true? (a) (AuB)= A (b) (A\B)n(B\A)= empty set (c) (A\B)n(B\A)= Z (d) (A\B)u(B\A)= empty set
Which of the following pair of functions has f o g = g o f (a)f(y)=y 3 and g(y)=y √ 3 (b) f(y)=y^{5} and g(y)=3y+7$$ (c) f(y)=y 2 and g(y)=y+7 (d) f(y)=y 2 and g(y)=3y+7