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Math Help - Are my answers correct?

  1. #1
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    Are my answers correct?

    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


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  2. #2
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    Quote Originally Posted by yitsongg View Post
    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


    ...
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  3. #3
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    2. Range all real
    3. Range x > 0
    5.
    Domain: x > 0
    6. Range negative infiniti to infiniti
    7. Range
    x>1
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  4. #4
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    Quote Originally Posted by yitsongg View Post
    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
    ...
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  5. #5
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    5. range y> 0
    7. range y>1
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  6. #6
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    Quote Originally Posted by yitsongg View Post
    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.
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  7. #7
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    5. range y> 0 to infinity, if this answers wrong my other answer y > 0
    7.
    y > 1
    Range
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  8. #8
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    y = ln(x)

    y = |x+1|
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  9. #9
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    Got it

    5. Range all real numbers
    7. All reall numbers for range
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  10. #10
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    Quote Originally Posted by yitsongg View Post
    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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