Find the inverse of:

5

2x

52

x

Find the constant of variation if it is a direct variation:

x = 10 & y = 2050

K = 205

If a spring stretches 20cmwith a force of 5 Newtons,

what is the constantof variation?

K = 4

Find ‘k’ if inverse variationwhen given;

x = 10 & y = 12

K = 120

(g+h)(x)

24 2x

24 2x

( k – i )(7)

2

What is the domain:

( )hx

f

3:

2R x

f(x) h(x)

3 26 9x x

gh(-4)

864

: ( )f

Find domain of xk

: 2R x

(j – f )(x)

2x x

fh(1)+j(4)

20

If ‘y’ varies directlywith ‘x’ when

y=5 and x=25, find the equation of

direct variation.

1

5y x

( )f g x

22 7x

( )g h x

49 2x

( )h i x

3 6x

1(2)i

2

(2)g h

146

1( )g x

2x

( )f k x

2 2 3x

(1)i j

6

1(4)f

1

2

( 2)k g g

36

( 3)f k

13

1

2i k f

2

1( )h x

3

3

x

( )h k x

23 2x

1( )j x

2 6 9x x

(7)k i

1

( )j f x

2 3 3x

1( 2)j

25

1( )f x

3

2

x

( )i g x

2 4x