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Math Help - Function Expression

  1. #1
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    Function Expression

    Hi, I just want to make sure that I have the correct answer.
    (a) 5
    (b) 5
    (c) 5
    (d) 3
    (e) 3
    (f) 3


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  2. #2
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    Quote Originally Posted by miss.strw View Post
    Hi, I just want to make sure that I have the correct answer.
    (a) 5
    (b) 5
    (c) 5
    (d) 3
    (e) 3
    (f) 3
    You have only one correct answer: (c).
    The others are incorrect.
    I will help you with d) \lim _{x \to 2^ -  } g(x) =  - 1
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  3. #3
    Senior Member bkarpuz's Avatar
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    Exclamation

    I hope the following graphic will help you.
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  4. #4
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    Is it
    a) 1
    b) 1
    c) 5
    d) -1
    e) -1
    f) DNE

    Is this correct???
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  5. #5
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    Quote Originally Posted by miss.strw View Post
    Is it
    a) 1
    b) 1
    c) 5
    d) -1
    e) -1
    f) DNE
    Is this correct???
    f) is incorrect, all others are correct.

    The answer to f) is -1. WHY?
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  6. #6
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    I dont know. and right now, I asked my friend n she say
    it is suppose to be:

    d) = -2
    f) = DNE

    Now I am confused. Am I right, or is she right?

    My answer is now

    d) -1
    f) -1 (But I don't understand why it is -1)
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  7. #7
    Senior Member bkarpuz's Avatar
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    Quote Originally Posted by miss.strw View Post
    I dont know. and right now, I asked my friend n she say
    it is suppose to be:

    d) = -2
    f) = DNE

    Now I am confused. Am I right, or is she right?

    My answer is now

    d) -1
    f) -1 (But I don't understand why it is -1)
    There is no limit at 2. You can easily see in the graphic that the broken curves (the ones on the right and left hand sides of 2) does not become arbitrarily closer to each other at 2 (as it happens for 1).
    I guess Plato made a typo, check your answer for d, it must be -2.



    Check the lines above by following the color order: red, yellow, green, blue and pink, as the vertical lines approach to 2 from left, the horizontal lines approach to -2.
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  8. #8
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    Quote Originally Posted by Plato View Post
    f) is incorrect, all others are correct.

    The answer to f) is -1. WHY?
    Okay I got it thanks guys! Awesome forum! *thumbs up*
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  9. #9
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    misread it.
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