Pre-Calculus, 9th edition

 PAGE: 106 SET: Exercises PROBLEM: 1
Please look in your text book for this problem Statement

Let be a point on the .

(a) Express the distance from to origin as a function of .

Substitute in .

.

(b) What is if .

Substitute in .

.

(c) What is if .

Substitute in .

.

(d) Graph the function .

Graph of :

(e) Find values of  is smallest

Plot the local minimum points on the graph of .

Observe the graph:

The local minimu points are .

is smallest when or .

(a) .

(b) .

(c) .

(d) Graph of :

(e) is smallest when or .

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