• Aug 29th 2009, 03:04 PM
yitsongg
State Domain and range

1. y=(x+1)^2 -3
2. y=x^3
3. y= √x
4. y=e^x
5. y=ln x
6. y= 1/x-2
7. y= |x+1|

1. Domain: All real numbers
Range: y>-3

2. Domain: All reall numbers
Range: y >0

3. Domain: x>0
Range: all real numbers

4. Domain: All real numbers
Range: y> 0

5.
Domain: All real numbers
Range: y> 0

6. Domain: x>2
Range: All real numbers

7. Domain: x>1
Range: All real number

• Aug 29th 2009, 03:55 PM
skeeter
Quote:

Originally Posted by yitsongg
State Domain and range

1. y=(x+1)^2 -3
2. y=x^3
3. y= √x
4. y=e^x
5. y=ln x
6. y= 1/x-2
7. y= |x+1|

1. Domain: All real numbers yes
Range: y>-3 y > -3

2. Domain: All reall numbers yes
Range: y >0 no

3. Domain: x>0 x > 0
Range: all real numbers no

4. Domain: All real numbers yes
Range: y> 0 yes

5.
Domain: All real numbers no
Range: y> 0 no

6. Domain: x>2 if you meant 1/(x-2) , all reals except x = 2
Range: All real numbers no

7. Domain: x>1 all reals
Range: All real number no

...
• Aug 29th 2009, 06:00 PM
yitsongg
2. Range all real
3. Range x > 0
5.
Domain: x > 0
6. Range negative infiniti to infiniti
7. Range
x>1
• Aug 29th 2009, 06:11 PM
skeeter
Quote:

Originally Posted by yitsongg
2. Range all real
3. Range x > 0 y > 0
5.
Domain: x > 0 x > 0
6. Range negative infiniti to infiniti y does not equal 0
7. Range
x>1 no

...
• Aug 29th 2009, 07:09 PM
yitsongg
5. range y> 0
7. range y>1
• Aug 30th 2009, 04:48 AM
skeeter
Quote:

Originally Posted by yitsongg
5. range y> 0
7. range y>1

looks like you're just guessing ... sorry, still incorrect.

I recommend you graph the functions and see the domain/range yourself.
• Aug 30th 2009, 08:40 AM
yitsongg
5. range y> 0 to infinity, if this answers wrong my other answer y > 0
7.
y > 1
Range
• Aug 30th 2009, 12:35 PM
skeeter
y = ln(x)

y = |x+1|
• Aug 30th 2009, 12:51 PM
yitsongg
Got it

5. Range all real numbers
7. All reall numbers for range
• Aug 30th 2009, 02:01 PM
skeeter
Quote:

Originally Posted by yitsongg
Got it

5. Range all real numbers ok
7. All reall numbers for range domain is all reals, range is y > 0

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