19 lines
328 B
Python
19 lines
328 B
Python
def fx(x):
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return x**4-3*x+1
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def erfen(x1,x2,err):
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while abs(x2-x1) >= err:
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x = (x1+x2)/2
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if fx(x) * fx(x1) < 0:
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x2 = x
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else:
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x1 = x
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return (x1+x2)/2
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if __name__ == "__main__":
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x1 = 0.3
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x2 = 0.4
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root = erfen(x1, x2, 0.5e-5)
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print(f"解为: {root}") |