Results 1 to 2 of 2

Math Help - Help on Pre-Calculus Review

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    1

    Help on Pre-Calculus Review

    Hi this is my first day of taking Calculus and I haven't taken any math classes since Pre-Calculus which was 2 years ago. I would like some help on solving these problems so any help would be very appreciated. Thanks in advanced!

    I know you can solve them using graphing calculators but I need help on how to find the Domain and Range of these problems without using a Calculator...

    1) y = ln(Xsquared - X - 6)

    2) y = sin(3X - pie)

    3) y = tan(2X)

    Find the difference in quotient, (f(X + H) - f(X)) / H, for f(X) = Xsquared - 2X and g(X) = (2X)/(X-1)

    I forgot how to do these kind of problems and they confuse me so much so any help would be appreciated...
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Quote Originally Posted by alienware View Post

    I know you can solve them using graphing calculators but I need help on how to find the Domain and Range of these problems without using a Calculator...

    1) y = ln(Xsquared - X - 6)

    the domain will be where x^2-x-6>0 as this is where the \ln function is defined


    Quote Originally Posted by alienware View Post

    2) y = sin(3X - pie)
    Can you think of any values for x that this function won't accept?


    Quote Originally Posted by alienware View Post

    3) y = tan(2X)
    Do you know where \tan has asymptotes?


    Quote Originally Posted by alienware View Post

    Find the difference in quotient, (f(X + H) - f(X)) / H, for f(X) = Xsquared - 2X and g(X) = (2X)/(X-1)
    The answer is in front of you

    f(x) = x^2-2x \implies f(x+h) = (x+h)^2-2(x+h)

    Now substitute these into

    \frac{f(x+h)-f(x)}{h}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. What to review for calculus 3?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: December 9th 2010, 03:40 PM
  2. an AP Calculus AB review question
    Posted in the Calculus Forum
    Replies: 3
    Last Post: April 8th 2010, 05:07 AM
  3. Calculus Review
    Posted in the Calculus Forum
    Replies: 2
    Last Post: January 6th 2010, 06:52 AM
  4. Review Excercises(Prerequisites for Calculus)
    Posted in the Calculus Forum
    Replies: 4
    Last Post: August 31st 2009, 07:51 PM
  5. calculus review sheet - logs
    Posted in the Calculus Forum
    Replies: 2
    Last Post: August 15th 2008, 07:34 PM

Search Tags


/mathhelpforum @mathhelpforum