(a,b) | (a,b) 的中點 | f(a) | f(b) | f() |
(0,1) | 0.5 | f(0)<0 | f(1)>0 | f(0.5)<0 |
(0.5,1) | 0.75 | f(0.5)<0 | f(1)>0 | f(0.75)>0 |
(0.5,0.75) | 0.625 | f(0.5)<0 | f(0.75)>0 | f(0.625)<0 |
(0.625,0.75) | 0.6875 | f(0.625)<0 | f(0.75)>0 | f(0.6875)<0 |
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