Exam 3: Polynomial and Rational Functions

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The equation has a solution r in the interval indicated. Approximate this solution correct to two decimal places. -x3 - 8x - 3 = 0; -3 ≤ r ≤-2

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Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. - f(x)=2x3+13x2+10x+25f ( x ) = 2 x ^ { 3 } + 13 x ^ { 2 } + 10 x + 25

(Multiple Choice)
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List the potential rational zeros of the polynomial function. Do not find the zeros. - f(x)=2x5−5x2+3x−1f ( x ) = 2 x ^ { 5 } - 5 x ^ { 2 } + 3 x - 1

(Multiple Choice)
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Find the x- and y-intercepts of f. - f(x)=−x2(x+6)(x2−1)f ( x ) = - x ^ { 2 } ( x + 6 ) \left( x ^ { 2 } - 1 \right)

(Multiple Choice)
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List the potential rational zeros of the polynomial function. Do not find the zeros. - f(x)=x5−4x2+3x+14f ( x ) = x ^ { 5 } - 4 x ^ { 2 } + 3 x + 14

(Multiple Choice)
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f(x)=−2(x−5)5+3f ( x ) = - 2 ( x - 5 ) ^ { 5 } + 3 f ( x ) = - 2 ( x - 5 ) ^ { 5 } + 3

(Multiple Choice)
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Solve the problem. -The profits (in millions) for a company for 8 years was as follows: Year, x Profits 1993,1 1.1 1994,2 1.7 1995,3 2.0 1996,4 1.4 1997,5 1.3 1998,6 1.5 1999,7 1.8 2000,8 2.1 Find the cubic function of best fit to the data.

(Short Answer)
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Use the Intermediate Value Theorem to determine whether the polynomial function has a zero in the given interval. -f(x) = -2x4 - 4x2 + 9; [-2, -1]

(Multiple Choice)
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State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not. - f(x)=3−13xf ( x ) = 3 - \frac { 1 } { 3 } x

(Multiple Choice)
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(Multiple Choice)
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Find the x- and y-intercepts of f. -f(x) = (x + 6)(x - 2)(x + 2)

(Multiple Choice)
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Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. - f(x)=x3+3x2−4x−12f ( x ) = x ^ { 3 } + 3 x ^ { 2 } - 4 x - 12

(Multiple Choice)
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(Multiple Choice)
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Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. - f(x)=3x3−2x2+9x−6f ( x ) = 3 x ^ { 3 } - 2 x ^ { 2 } + 9 x - 6

(Multiple Choice)
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Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. - f(x)=5x4−7x3+22x2−28x+8f ( x ) = 5 x ^ { 4 } - 7 x ^ { 3 } + 22 x ^ { 2 } - 28 x + 8

(Multiple Choice)
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Find the x- and y-intercepts of f. - f(x)=(x+5)(x−3)(x+3)f ( x ) = ( x + 5 ) ( x - 3 ) ( x + 3 )

(Multiple Choice)
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Solve the equation in the real number system. - x4−8x3+16x2+8x−17=0x ^ { 4 } - 8 x ^ { 3 } + 16 x ^ { 2 } + 8 x - 17 = 0

(Multiple Choice)
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f(x) = (x + 5)5 f(x) = (x + 5)<sup>5 </sup>

(Multiple Choice)
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Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. - f(x)=2x4−12x3+19x2−6x+9f ( x ) = 2 x ^ { 4 } - 12 x ^ { 3 } + 19 x ^ { 2 } - 6 x + 9

(Multiple Choice)
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List the potential rational zeros of the polynomial function. Do not find the zeros. - f(x)=6x4+4x3−2x2+2f ( x ) = 6 x ^ { 4 } + 4 x ^ { 3 } - 2 x ^ { 2 } + 2

(Multiple Choice)
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