Exam 3: Polynomial and Rational Functions

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Solve the inequality. - x−1x+4>0\frac { x - 1 } { x + 4 } > 0

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Give the maximum number of zeros the polynomial function may have. Use Descarte's Rule of Signs to determine how many positive and how many negative zeros it may have. - f(x)=x7+x6+x2+x+8f ( x ) = x ^ { 7 } + x ^ { 6 } + x ^ { 2 } + x + 8

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Use the given zero to find the remaining zeros of the function. - f(x)=2x4−17x3+71x2−153x+117; zero: 2+3if ( x ) = 2 x ^ { 4 } - 17 x ^ { 3 } + 71 x ^ { 2 } - 153 x + 117 ; \text { zero: } 2 + 3 i

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Give the equation of the oblique asymptote, if any, of the function. - f(x)=x2−636x−x4f ( x ) = \frac { x ^ { 2 } - 6 } { 36 x - x ^ { 4 } }

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Use the given zero to find the remaining zeros of the function. - f(x)=x5−10x4+42x3−124x2+297x−306f ( x ) = x ^ { 5 } - 10 x ^ { 4 } + 42 x ^ { 3 } - 124 x ^ { 2 } + 297 x - 306 ; zero: 3i3 i

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Find the x- and y-intercepts of f. - f(x)=(x+5)(x−4)(x+4)f ( x ) = ( x + 5 ) ( x - 4 ) ( x + 4 )

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Use the Factor Theorem to determine whether x - c is a factor of f(x). - f(x)=x4+12x3+4x2+43x−60;x+12f ( x ) = x ^ { 4 } + 12 x ^ { 3 } + 4 x ^ { 2 } + 43 x - 60 ; x + 12

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Give the equation of the horizontal asymptote, if any, of the function. - h(x)=7x2−5x−48x2−8x+9h ( x ) = \frac { 7 x ^ { 2 } - 5 x - 4 } { 8 x ^ { 2 } - 8 x + 9 }

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Use transformations of the graph o to graph the function. y=x4 or y=x5y = x ^ { 4 } \text { or } y = x ^ { 5 } - f(x)=4−(x−2)5f ( x ) = 4 - ( x - 2 ) ^ { 5 }  Use transformations of the graph o to graph the function.  y = x ^ { 4 } \text { or } y = x ^ { 5 }  - f ( x ) = 4 - ( x - 2 ) ^ { 5 }

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Use the Factor Theorem to determine whether x - c is a factor of f(x). - f(x)=x3+2x2−6x+8;x−4f ( x ) = x ^ { 3 } + 2 x ^ { 2 } - 6 x + 8 ; x - 4

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Graph the function. - f(x)=2x(x+3)(x−1)f(x)=\frac{2 x}{(x+3)(x-1)}  Graph the function. - f(x)=\frac{2 x}{(x+3)(x-1)}

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List the potential rational zeros of the polynomial function. Do not find the zeros. - f(x)=−2x3+4x2−3x+8f ( x ) = - 2 x ^ { 3 } + 4 x ^ { 2 } - 3 x + 8

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Determine the maximum number of turning points of f. - f(x)=−x2(x+6)3(x2−1)f ( x ) = - x ^ { 2 } ( x + 6 ) ^ { 3 } \left( x ^ { 2 } - 1 \right)

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Form a polynomial whose zeros and degree are given. Use a leading coefficient of 1. -Zeros: −5,−3,3- 5 , - 3,3 ; degree 3

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Solve the inequality. - (x−2)2x2−9>0\frac { ( x - 2 ) ^ { 2 } } { x ^ { 2 } - 9 } > 0

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Use transformations of the graph o to graph the function. y=x4 or y=x5y = x ^ { 4 } \text { or } y = x ^ { 5 } - f(x)=x4−5f(x)=x^{4}-5  Use transformations of the graph o to graph the function.  y = x ^ { 4 } \text { or } y = x ^ { 5 }  - f(x)=x^{4}-5

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Give the equation of the horizontal asymptote, if any, of the function. - h(x)=9x−4x−4h ( x ) = \frac { 9 x - 4 } { x - 4 }

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Solve the equation in the real number system. - 2x3−x2−12x+6=02 x ^ { 3 } - x ^ { 2 } - 12 x + 6 = 0

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Find the indicated intercept(s) of the graph of the function. - yy -intercept of f(x)=x−53x−3f ( x ) = \frac { x - 5 } { 3 x - 3 }

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Graph the function using transformations. - f(x)=6−1(x+3)2f ( x ) = 6 - \frac { 1 } { ( x + 3 ) ^ { 2 } }  Graph the function using transformations. - f ( x ) = 6 - \frac { 1 } { ( x + 3 ) ^ { 2 } }

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