4.1.lesson completed_Oct.08

4.1.lesson completed_Oct.08 - 4.1solve.eqns.lesson.notebook...

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4.1solve.eqns.lesson.notebook 1 October 08, 2008 Oct 7­7:45 PM 4.1 Solving Polynomial Equations Recall: Polynomial Fns: y = a n x n + a n­1 x n­1 + ... + a 1 x + a 0 , a ∈R, n ∈W Corresponding Eq'n: 0 = a n x n + a n­1 x n­1 + ... + a 1 x + a 0 , which has at most 'n' real roots (zeros, or solutions) Ex.1 From the graphs shown, state the nature of the roots of the corresponding equation. Oct 7­8:12 PM Ex. 2 Solve each equation and compare it to the corresponding function. a) 2x ­ 3 = 0
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