newton method 求解平方根,newtonmethod,#!/usr/bin/p


#!/usr/bin/pythondef sqrt_iter(guess,x):    if(good_enough(guess, x)):        print guess    else:        sqrt_iter(improve(guess, x),x)def improve(guess, x):    return average(guess, x/guess)def average(x,y):     return (x+y)/2def good_enough(guess,x):    if(abs(guess * guess -x) < 0.0001):        return True    else:        return Falsedef sqrt_oliver(x):    sqrt_iter(1.0,x)sqrt_oliver(5)

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