1. Given: f(x) = x^n+y^n. for which value(s) of n is x+y a factor of f(x)

2. 2x^3-x^2-2x+2 = (2x-1).Q(x)+R(x) for all values of x. What is the value of R?

3. if x^3 + kx^2 -3 is divided by x+2 the remainder is 3 more than the remainder when the same expression is divided by x-1. find the value of k