G 4. Suppose that : → is a function, and that ⊆ and ⊆ . a) Prove that ( ∩ ) ⊆ () ∩ () b) Prove that ( ∩ ) = () ∩ () given that is an injective map.

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4

Determine the domain and range of the given function. the domain is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}. the range is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g