Shadly
Which of the following functions is the inverse also the function?
I) f(x)= X^3
II) f(x)= X^4
III) f(x)= - |X|
They're can be multiple answers because my choices are
a. I and II only c. I, II, and III
b. I only d. III only
Delete
Share
This Question is Closed
amistre64
Best Response
You've already chosen the best response.
1
also "a" function .. or also "the same" function?
Shadly
Best Response
You've already chosen the best response.
0
Also a function, lol sorry
amistre64
Best Response
You've already chosen the best response.
1
odd degrees are functionable; even degrees need a restricted domain
amistre64
Best Response
You've already chosen the best response.
1
|dw:1373401421696:dw|
amistre64
Best Response
You've already chosen the best response.
1
|dw:1373401514303:dw|
tcarroll010
Best Response
You've already chosen the best response.
1
Choice #3 inverse is not a function:
x = -|y| -> x = -(-y) or -y -> x = y or -y
2 different values of y for each x except for at the origin.
Shadly
Best Response
You've already chosen the best response.
0
Okay, how do I figure out the other two?
tcarroll010
Best Response
You've already chosen the best response.
1
Well, it looks to me like @amistre64 gave you great help on the first 2.
Shadly
Best Response
You've already chosen the best response.
0
I had no idea what she was doing
swissgirl
Best Response
You've already chosen the best response.
0
He is mister not a missus :P
tcarroll010
Best Response
You've already chosen the best response.
1
The 2 graphs in each post show the function and the inverse to the right of it. A picture tells a thousand words.
amistre64
Best Response
You've already chosen the best response.
1
graphwise .... -|x| is basically the same as -x^2
Shadly
Best Response
You've already chosen the best response.
0
I dont really understand the graphs... I know the third one isn't a function and I'm guessing the first isn't either...
amistre64
Best Response
You've already chosen the best response.
1
do you know what a degree is?
Shadly
Best Response
You've already chosen the best response.
0
no
amistre64
Best Response
You've already chosen the best response.
1
the exponent ...
amistre64
Best Response
You've already chosen the best response.
1
x^(even) is not invertible without restricting its domain
x^(odd) is invertible
Shadly
Best Response
You've already chosen the best response.
0
okay
Shadly
Best Response
You've already chosen the best response.
0
I think I got it thanks ^_^
amistre64
Best Response
You've already chosen the best response.
1
good luck :)