Results 1 to 9 of 9

Thread: Function Expression

  1. #1
    Junior Member
    Joined
    Sep 2009
    Posts
    25

    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


    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    21,743
    Thanks
    2814
    Awards
    1
    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) $\displaystyle \lim _{x \to 2^ - } g(x) = - 1$
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member bkarpuz's Avatar
    Joined
    Sep 2008
    From
    R
    Posts
    481
    Thanks
    2

    Exclamation

    I hope the following graphic will help you.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Sep 2009
    Posts
    25
    Is it
    a) 1
    b) 1
    c) 5
    d) -1
    e) -1
    f) DNE

    Is this correct???
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor

    Joined
    Aug 2006
    Posts
    21,743
    Thanks
    2814
    Awards
    1
    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?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Junior Member
    Joined
    Sep 2009
    Posts
    25
    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)
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Senior Member bkarpuz's Avatar
    Joined
    Sep 2008
    From
    R
    Posts
    481
    Thanks
    2
    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 $\displaystyle 2$. You can easily see in the graphic that the broken curves (the ones on the right and left hand sides of $\displaystyle 2$) does not become arbitrarily closer to each other at $\displaystyle 2$ (as it happens for $\displaystyle 1$).
    I guess Plato made a typo, check your answer for d, it must be $\displaystyle -2$.



    Check the lines above by following the color order: red, yellow, green, blue and pink, as the vertical lines approach to $\displaystyle 2$ from left, the horizontal lines approach to $\displaystyle -2$.
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Junior Member
    Joined
    Sep 2009
    Posts
    25
    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*
    Follow Math Help Forum on Facebook and Google+

  9. #9
    MHF Contributor

    Joined
    Aug 2006
    Posts
    21,743
    Thanks
    2814
    Awards
    1
    misread it.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Function expression needed
    Posted in the Algebra Forum
    Replies: 4
    Last Post: Jul 27th 2011, 03:32 PM
  2. [SOLVED] An expression representing the following function...
    Posted in the Pre-Calculus Forum
    Replies: 7
    Last Post: Sep 24th 2010, 07:50 PM
  3. Find Function expression
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 1st 2010, 10:02 AM
  4. function calculus expression
    Posted in the Calculus Forum
    Replies: 2
    Last Post: May 18th 2008, 06:30 PM
  5. Determining an expression for a function
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: Aug 20th 2007, 05:56 PM

Search Tags


/mathhelpforum @mathhelpforum