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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def p0_reciprocal(xs, ys):
 """ predictor for first guess for reciprocal """

    a0 = ys[len(ys) - 1]
    b0 = ys[0]*xs[0] - a0*xs[0]
    return [a0, b0, 1]