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Exercise 2.4<br />

PART A<br />

1. What are the exponent rules? Give examples of each rule.<br />

2. Copy the table, and complete it without using the quotient rule.<br />

Function Rewrite Differentiate and Simplify, if Necessary<br />

f1x2 x2 3x<br />

, x 0<br />

x<br />

g1x2 3x 5 3<br />

x , x 0<br />

h1x2 1<br />

10x 5, x 0<br />

y 8x3 6x<br />

, x 0<br />

2x<br />

s t2 9<br />

t 3 , t 3 CHAPTER 2 97<br />

C<br />

K<br />

T<br />

3. What are the different ways to find the derivative of a rational function?<br />

Give examples.<br />

PART B<br />

4. Use the quotient rule to differentiate each function. Simplify your answers.<br />

a.<br />

x 13x 52<br />

h1x2 <br />

x c. h1x2 <br />

x3<br />

e. y <br />

x 1<br />

2x 2 1<br />

1 x 2<br />

b. d. f. y x2 x 1<br />

h1t2 2t 3 h1x2 1<br />

t 5<br />

x 2 3<br />

x 2 3<br />

dy<br />

5. Determine at the given value of x.<br />

dx<br />

a. y 3x 2<br />

x 5 , x 3<br />

c. y x2 25<br />

x 2 25 , x 2<br />

b. y <br />

x3<br />

x 2 9 , x 1 d.<br />

1x 121x 22<br />

y <br />

1x 121x 22 , x 4<br />

6. Determine the slope of the tangent to the curve y <br />

x3 at point 13, 92.<br />

x 2 6<br />

7. Determine the points on the graph of y 3x where the slope of the<br />

tangent is 12<br />

x 4<br />

25 .<br />

8. Show that there are no tangents to the graph of f 1x2 5x 2 that have<br />

x 2<br />

a negative slope.<br />

NEL

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