Precalculus : Polynomial Functions

Study concepts, example questions & explanations for Precalculus

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Example Questions

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Example Question #1 : Solve Radical Equations And Inequalities

Solve this radical function:

Possible Answers:

None of these answers.

Correct answer:

Explanation:

Add x to both sides:

Square both sides:

Simplify:

Factor and set equal to zero:

Example Question #9 : Radical Functions

Which of the following is and accurate graph of ?

Possible Answers:

Varsity6

Varsity3

Varsity5

Varsity2

 

Varsity4

Correct answer:

Varsity2

Explanation:

Remember , for .

Step 1, realize where starts: A) observe  never occurs, B) zero-out the radical component of ;

               

                

                

C) The resulting point is .

Step 2, find simple points for  after

, so use

             

             

             

The next resulting point; .

, so use ;

            

            

            

The next resulting point; .

Step 3, draw a curve through the considered points.

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