Results 1 to 3 of 3

Math Help - graphing log

  1. #1
    Newbie
    Joined
    Aug 2007
    From
    fratta terme forli Italy
    Posts
    14

    Exclamation graphing log

    i must sketch graph of these 2 functions

    y=4log4x+1
    y=e^3x
    I am unsure how to find x and y intercepts for this problems could anyone please show me formula how to get coordinates to make this graph
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor red_dog's Avatar
    Joined
    Jun 2007
    From
    Medgidia, Romania
    Posts
    1,252
    Thanks
    5
    9,\infty)\to\mathbf{R}" alt="f(x)=4\log 4x+1,f9,\infty)\to\mathbf{R}" />
    To find the interecept with x-axis, you must to solve the equation f(x)=0.
    \displaystyle 4\log 4x+1=0\Rightarrow \log 4x=-\frac{1}{4}\Rightarrow 4x=10^{-\frac{1}{4}}\Rightarrow x=\frac{1}{4\cdot 10^{\frac{1}{4}}}
    The graph does not intercept y-axis.

    g(x)=e^{3x},g:\mathbf{R}\to(0,\infty)
    The graph does not intercept the x-axis.
    To find the intercept with y-axis, you have to calculate g(0):
    g(0)=1

    Then give to x some other values in the domain to find some other values for f or g.

    Here are the sketches.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Aug 2007
    From
    fratta terme forli Italy
    Posts
    14

    to substitute into eaquations

    so then for completing the plot where do i substitute in equation for making curves ?? thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. graphing
    Posted in the Algebra Forum
    Replies: 6
    Last Post: May 19th 2011, 05:43 AM
  2. Graphing
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: May 23rd 2009, 05:31 PM
  3. graphing of sin and cos
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: October 28th 2008, 09:50 AM
  4. Graphing
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: January 16th 2008, 11:18 AM
  5. help with graphing
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: December 9th 2007, 09:23 AM

Search Tags


/mathhelpforum @mathhelpforum