functions

Question 1

range and domain?

Answer 1

range is y values , domain is x values

Question 2

inverse function how to work out range and domain

Answer 2

range of original function becomes the domain, and the domain of inverse function becomes the range

Question 3

f (| x |)

Answer 3

positive x values are reflected

Question 4

| f(x) |

f(x) |

Answer 4

positive y values are reflected

Question 5

y=2x + 3
what is the method to work out this inverse function

Answer 5

1) re arrange to make x the subject
2) switch y with x

Question 6

modulus defintioin

Answer 6

pays attention to the distance away from 0, not the sign , eg | -3 | is just 3

Question 7

how to solve |2x+3|=5

Answer 7

2x+3= 5
and
2x+3= -5

Question 8

how to solve | x+3 |> 4

Answer 8

x+3>4
and
x+3<-4

Question 9

how to solve 4-2|2x + 1|< 5

Answer 9

2x + 1 > - 1/2
2x + 1 < 1/2
WHEN U MULTIPLY OR DIVIDE BY A NEGATIVE NUMBER INEQUALITY WILL FLIP

Question 10

when solving modulus what do you change the sign of

Answer 10

NOT the modulus , change sign of what its equal to

Question 11

what to do if ur soliving when 2 modulus are qual to eahother

Answer 11

square them to get rid of modulus, then solve

Question 12

when is there not a function

Answer 12

one to many

Question 13

when can there be an inverse function

Answer 13

one to one