Decide if the following biconditional statement is true or false:
A shape is a quadrilateral if and only if it is a
square.
True or False

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Find the degree 3 taylor polynomial p3(x) of function f(x)=(-3x+15)^(3/2) at a=2

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.