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Posted by on Tuesday, March 1, 2011 at 12:47pm.

PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks.

f(x)= x^3+2x^2-x-2 / x^2+x-6

find:
1. domain
2. symmetry or not
3. determine if f(x)is: a)in lowest trem b)proper/improper
4. x-intercepts, y-intercepts
5. zeros of f(x) and their multiplicity
6. vertical asymptotes
7. ablique/horizontal asymtotes

  • mth - , Thursday, March 3, 2011 at 11:14pm

    We have a fraction in which a cubic Eq is the numerator and a Quadratic Eq is the denominator. Let's factor both.

    Find a value of X that gives 0 out when
    plugged into the cubic Eq. It was found
    by trial and error that -2 will give
    an output of 0 and,therefore, satisfies
    the Eq.
    X = -2,
    X + 2 = 0. Using long-hand division,
    divide the cubic Eq by x + 2 and get:
    X^2 - 1.
    (X + 2)(X^2 - 1) = 0,
    (X + 2)(X + 1)(X - 1) = 0 = numerator.
    Factor the denominator and get:
    (X - 2)(X + 3) = 0. Therefore,

    F(x)=(X + 2)(X + 1)(X -1)/(X -2)(X + 3)
    The domain = all real values of x
    that does not make the denominator = 0.
    2 and -3 will make the denominator = 0
    and are outside the domain.

    1. So the domain = all real values of X
    except 2 and -3.
    3. a. Not in lowest term as given.
    b. Proper fraction.

    4. X-Ints = -2, -1 , 1 = roots = solu.
    When X = 0, F(0) = -2/-6 = 1/3 = Y-int.

    5. Zeroes = X-Ints = -2,-1, and 1.

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