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Lots of Pages Homework Pg. 184#41 – 53 all #28 C(7, 4) r = #33 #40 (-∞, -5/3]U[3, ∞)#42[-2, -1)U(-1, ∞) #52 (-∞, 2]#88y – axis #91 origin#104Does not pass HLT # 105 y = (x 2 /4) + 4 #106(- ∞, ∞) and [0, ∞) #107 a) origin; b) y – axis #15c = 17/3 #24 ↖ ↗#300.05x 7 #9 x = -3.60, -0.88, 1.63; max (-2.85, 74.12), (0.37, -2.52); min(-0.32, -3.43), (1.19, -4.33) #19 x = -5.81, 1.04, 6.27; max (-3, 211); min(4, -132) #24 D:(-∞, -5)U(-5, ∞); R:(-∞, 0)U(0, ∞); Discontinuous at x = -5 #26 D:(-∞, -0.5)U(-0.5, ∞); R:(-∞, ∞); Discontinuous at x = -0.5
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3.1 Graphs of Polynomial Functions Information from a Function End behavior type End behavior model Determine domain and range Determine all zeros Determine y – intercept Determine all local min/max values Determine intervals of increasing/decreasing Draw a complete graph Find all the information for: When working with IVT, the function must be: ___________ Then you check: ____________ If the value is inside the endpoints, proceed to find the c. If the value is outside the endpoints, graph to know whether or not to proceed.
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3.3 Real Zeros of Polynomials: The Factor Theorem Remainder Theorem If a polynomial is divided by x – c, then the remainder is f(c). Thus f(x) = (x – c)q(x) + f(c) where q(x) is the quotient. Examples Find the remainder when the polynomial: f(x) = x 3 + 3x 2 – 2x – 7 is divided by x – 2 x + 4
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3.3 Real Zeros of Polynomials: The Factor Theorem Factor Theorem Let f(x) be a polynomial. Then x – c is a factor of f(x) if, and only if, c is a zero of f(x). -3 is a zero → x + 3 is a factor 5 is a zero → x – 5 is a factor Examples Use your calculator to find the zeros of: f(x) = 2x 3 – 4x 2 + x – 2 Use long division to prove x – 2 is a factor of f(x) = 2x 3 – 4x 2 + x – 2
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3.4 Rational Zeros and Horner’s Algorithm Rational Zero’s Theorem If f(x) is a polynomial with all coefficients as integers and p as the constant term and q as the leading coefficient, then x = p/q is a rational zero. Examples Make a complete list of possible rational number zeros of f(x) = 12x 5 – 5x 3 + 4x – 15
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