# MAT 222 ASSIGNMENT WEEK 5

pls help…homework is attach in a doc file.

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1. g={(-9,-5) , (-2,1) , (0, -3) ,(1,9)}

h(x)= 3x-14

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Find the following:

g^-1(1)

h^-1(x)

(h∘h^-1)(-2)

2. Suppose that the relation G is defined as follows.

G={ (0,-8),(3,3),(-1,8),(8,1)}

Give the domain and range of G.

3.suppose that the functions r and s are defined for all real numbers x as follows.

r(x)=2x^2

s(x)=3x

write the expressions for (r+s)(x) and (r-s)(x) and evaluate (r*s)(-1).

4. Suppose that the functions p and q are define as follows:

p(x)=x^2+8

q(x)=squareroot x+1

Find the following:

(q∘p)(4)

(p∘q)(4)

5.suppose that the finction h is defined, for all real numbers, as follows:

h(x) { -1/2x-1 if x <-2

{ (x-1)2 – 2 if -2 ≤ x < 2

{ -4 if x ≥ 2

Find the following: h(-1) , h(2) , h(4)

6. below is a graph of y = f(x)

Translate it to make it a graph of y= f(x-2)

7. below is a graph pf y = squareroot of x

Translate it to make it a graph of y = square rootx+1 – 2.

8. For each pair of functions  and  below, find  and  .
Then, determine whether  and  are inverses of each other.

Simplify your answers as much as possible.
(Assume that your expressions are defined for all  in the domain of the composition.

You do not have to indicate the domain.)

a) f(x)=x+4
g(x)=x-4
f( g(x) ) = ?
g( f (x) ) = ?
f and g are inverses with each other.
F and g are not inverses of each other
(Pick one)

b) f(x)= -1/6x , x inequality sign 0
g(x)= 1/6x , x inequality sign 0
f (g(x) ) = ?
g(f(g)) = ?
f and g are inverses with each other.
F and g are not inverses of each other
(Pick one)

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