Exam 2: Polynomial and Rational Functions

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 Sketch the graph of the rational function below. \text { Sketch the graph of the rational function below. } f(x)=−x2−1xf(x)=-\frac{x^{2}-1}{x}

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Match the equation with its graph. f(x)=x4−17x2+1620f ( x ) = \frac { x ^ { 4 } - 17 x ^ { 2 } + 16 } { 20 }

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Use long division to divide. (x3+5x2+36x+180)÷(x+5)\left( x ^ { 3 } + 5 x ^ { 2 } + 36 x + 180 \right) \div ( x + 5 )

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Suppose the IQ scores (y( y , rounded to the nearest 10)10 ) for a group of people are summarized in the table below. Use the regression feature of a graphing utility to find a quadratic function of the form y=ax2+bx+cy = a x ^ { 2 } + b x + c for the data. IQ Score Number of People 70 50 80 76 90 89 100 93 110 74 120 53 130 16

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Write the complex conjugate of the following complex number and then multiply the number by the complex conjugate. Write the result in standard form. 2+−272 + \sqrt { - 27 }

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Write the standard form of the equation of the parabola that has a vertex at (−23,19)\left( \frac { - 2 } { 3 } , \frac { 1 } { 9 } \right) and passes through the point (3,−4)( 3 , - 4 ) .

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Perform the addition or subtraction and write the result in standard form. −(7.2−12.3i)−(8.1−−1.21)- ( 7.2 - 12.3 i ) - ( 8.1 - \sqrt { - 1.21 } )

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Find real numbers aa and bb such that the equation a+bi=4−9ia + b i = 4 - 9 i is true.

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Simplify 2+5i3i\frac { 2 + 5 i } { 3 i } and write the answer in standard form.

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Use long division to divide. (2x2+11x+12)÷(x+4)\left( 2 x ^ { 2 } + 11 x + 12 \right) \div ( x + 4 )

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Find all zeros of the function f(x)=(x+6)(x+3i)(x−3i)f ( x ) = ( x + 6 ) ( x + 3 i ) ( x - 3 i ) .

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Which of the following is the graph of the given equation? f(x)=2−xx+3f ( x ) = \frac { 2 - x } { x + 3 }

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Find two positive real numbers whose product is a maximum and whose sum is 146 .

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If x=25x = \frac { 2 } { 5 } is a root of 25x3−70x2+44x−8=025 x ^ { 3 } - 70 x ^ { 2 } + 44 x - 8 = 0 , use synthetic division to factor the polynomial completely and list all real solutions of the equation.

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Find all real zeros of the polynomial f(x)=x4+8x3+12x2f ( x ) = x ^ { 4 } + 8 x ^ { 3 } + 12 x ^ { 2 } and determine the mutiplicity of each.

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Find a polynomial function with following characteristics. Degree: 4 Zero: −1- 1 , multiplicity: 2 Zero: −3- 3 , multiplicity: 2 Falls to the left, Falls to the right Absolute value of the leading coefficient is one

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Find the zeros of the function below algebraically, if any exist. f(x)=x5−9x3+27x2−243f ( x ) = x ^ { 5 } - 9 x ^ { 3 } + 27 x ^ { 2 } - 243

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Find the zeros of the function below algebraically, if any exist. f(x)=x6+28x3+27f ( x ) = x ^ { 6 } + 28 x ^ { 3 } + 27

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Use long division to divide. (x3+4x−1)÷(x+2)\left( x ^ { 3 } + 4 x - 1 \right) \div ( x + 2 )

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Find the quadratic function ff whose graph intersects the xx -axis at (−7,0)( - 7,0 ) and (1,0)( 1,0 ) and the yy -axis at (0,−14)( 0 , - 14 ) .

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