Results 1 to 2 of 2

Math Help - Help please

  1. #1
    Junior Member
    Joined
    Mar 2013
    From
    Australia
    Posts
    58

    Help please

    Help please-assignment-5-question-2.png
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Oct 2012
    From
    Ireland
    Posts
    507
    Thanks
    138

    Re: Help please

    a) The domain is the range of numbers for which the function is defined. For example \sqrt{x} has the domain [0,\infty) because it is defined everywhere except where x is negative.

    b) The x intercept occurs when f(x)=0, the y intercept occurs when x=0

    c) consider what happens when x becomes very large.

    d) f is increasing when the slope is positive

    e) The maxima and minima occur when f'(x)=0
    You are asked to find the VALUES of f(x) at these maxima and minima so determine the value of f(x) at the points
    Suppose x=a satisfies f'(x)=0 so that f'(a)=0. The point is a maximum if f''(a)<0 and a minimum is f''(a)>0. If f''(a)=0 it is neither a maximum or minimum.

    With the values from e) and knowing the asymptotes if they exist you can sketch f.
    Follow Math Help Forum on Facebook and Google+


/mathhelpforum @mathhelpforum