2. A. Indicate whether the following functions are: 1-1, onto, total by circling all valid options. The domain and codomain are specified. Justify briefly. (i) f(x)=x. Domainis N.Codomainis N. 1-1 Onto Total (ii) f(x)=x2.Domainis N.Codomainis N. 1-1 Onto Total (iii) f(x)= x+1. Domain is Z+. Codomain is Z+. 1-1 Onto Total (iv) f(x)= [x/2]. Domain is N. Codomain is N. 1-1 Onto Total

Graph the function fx) = [4x- 1, if x <-1 Determine if the function is continuous [x-3, if x 2-1 everywhere. Explain how you know.

Identify where the function f(x) = x³ – 4x? + 8x + 1 is increasing, decreasing, concave up, and concave down. (Give your answer as an interval in the form (*,*). Use the symbol o for infinity, U for combining intervals, and an appropriate type of parentheses "(",")", "[", or "]" depending on whether the interval is open or closed. Express numbers in exact form. Use symbolic notation and fractions where needed. Enter DNE if no such interval exists.) f is increasing on: f is decreasing on: f is concave up on: f is concave down on: Use the graphing utility to graph f. f(x) = 20 y + 10 -20 -10 10 20 -10 powered by Sousep -20