Results 1 to 4 of 4
Like Tree2Thanks
  • 1 Post By chiro
  • 1 Post By ReneG

Math Help - Help with logarithmic function question? (Graphing)?

  1. #1
    Junior Member
    Joined
    Mar 2013
    From
    Unknown
    Posts
    73
    Thanks
    2

    Exclamation Help with logarithmic function question? (Graphing)?

    So the question goes like this:


    The curve crosses the x-axis at x=2. Find the value of k.
    Hence, using the graphical method, find the value of x for which ln(3x-k)=e^x-10

    I've already solved the first part of the question. My answer is k=5.
    Can anyone help me with the 2nd part of the question? Im not sure how to approach it.
    Is e^x-10 another graph? Do i have to find the intercepts?

    Thank you so much!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,698
    Thanks
    620

    Re: Help with logarithmic function question? (Graphing)?

    Hey pumbaa213.

    e^x - 10 is another function of x and the intersection occurs when the two expressions are equal.

    Basically you need to solve for x by getting x on one side of the equation (if possible but for this particular example probably not).

    So with the graphical method, you need to plot both curves and see where they cross each other (i.e. intersect).
    Thanks from pumbaa213
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member ReneG's Avatar
    Joined
    Mar 2013
    From
    United States
    Posts
    66
    Thanks
    9

    Re: Help with logarithmic function question? (Graphing)?

    Thanks from pumbaa213
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Mar 2013
    From
    Unknown
    Posts
    73
    Thanks
    2

    Re: Help with logarithmic function question? (Graphing)?

    Thanks guys!!!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: November 10th 2010, 10:02 AM
  2. graphing logarithmic equation
    Posted in the Algebra Forum
    Replies: 6
    Last Post: April 7th 2010, 12:20 AM
  3. Logarithmic function question
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: February 14th 2010, 05:13 PM
  4. Easy question about graphing a cos function
    Posted in the Calculators Forum
    Replies: 2
    Last Post: September 21st 2009, 05:09 PM
  5. Graphing Function Question
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: April 2nd 2008, 07:35 PM

Search Tags


/mathhelpforum @mathhelpforum