Question

What's the domain and range of this function? f(x)= -(x-1)^2+2

Answer 1

all real domain, (2, infinity) range

Answer 2

x = all reals
y = (-infinity, 1)

Answer 3

oops. I forgot my -. Hero you're a hero.

Answer 4

but isn't it (-infinity, 2)?

Answer 5

Do you want me to solve it for you?

Answer 6

my graphy calculator already did that!

Answer 7

Find the inverse of the function first, then replace x with y

Answer 8

why would you do that?

Answer 9

Oh, you're right :o)

Answer 10

:P

Answer 11

You find the inverse of the function to find the range

Answer 12

totally not necessary with parabolas mostly.

Answer 13

Yeah, but if you didn't have your graphing calc, then what would you do?

Answer 14

graph it :P

Answer 15

it's just a normal parabola, not even a stretch factor.

Answer 16

Taking the inverse is much easier for me

Answer 17

but I'm curious now. how do you use the inverse to find domain?

Answer 18

just find the inverse?

Answer 19

You use it to find the range, not the domain

Answer 20

oh?

Answer 21

can you show work?

Answer 22

You can find the domain without manipulating the equation. I know we both know that

Answer 23

You want me to write out all my steps?

Answer 24

I'd rather do it on twiddla

Answer 25

http://www.twiddla.com/solved