Results 1 to 2 of 2

Math Help - few functions questions

  1. #1
    Newbie
    Joined
    Jul 2010
    Posts
    8

    few functions questions

    So i just did a practice exam.. since i cant find any solutions anywhere i thought i would verify questions im not sure about.

    1.) g(x) = x^2+3
    h(x)= sqrt(x)

    evaluate g(h(5))

    h(5) = sqrt(5)
    g(h(5))= (sqrt(5))^2+3
    = 5+3 = 8

    is that right?


    2.) for inverse functions you just reverse the values so for
    A(1,3) B(2,4)

    inverse is
    A(3,1) B(4,2)
    ?

    3.) for function y=loge(x) apply following transformations

    reflection in x axis
    = -loge(x)
    reflection in y axis
    = -loge(-x)
    dilation by factor 3 in x axis
    = -3loge(-x)
    dilation by factor 1/2 in y axis
    = -3loge(-2x)
    translation 4 right 1 up
    -3loge(-2x-4)+1

    is this right? im not sure
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member Mathelogician's Avatar
    Joined
    Jun 2010
    From
    Iran
    Posts
    89
    Thanks
    1
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. questions on functions
    Posted in the Algebra Forum
    Replies: 7
    Last Post: August 8th 2011, 05:18 AM
  2. Functions questions
    Posted in the Discrete Math Forum
    Replies: 5
    Last Post: August 5th 2010, 01:38 AM
  3. Two questions on functions
    Posted in the Differential Geometry Forum
    Replies: 6
    Last Post: November 13th 2009, 05:32 AM
  4. advanced functions questions
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: March 25th 2009, 06:32 PM
  5. Functions questions
    Posted in the Algebra Forum
    Replies: 2
    Last Post: February 15th 2008, 04:42 AM

Search Tags


/mathhelpforum @mathhelpforum