Can someone me on f.) this stuff is like functions and expressions.

What are the domain and range of the function f(x)=2^x+1

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b

Let x = a + bi and y = c + di and z = f + gi. which statements are true?