题干

若函数f(x)=x3+x2﹣2x﹣2的一个正数零点附近的函数值用二分法逐次计算,参考数据如下:f(1)=﹣2,f(1.5)=0.625;f(1.25)=﹣0.984,f(1.375)=﹣0.260;

f(1.438)=0.165,f(1.4065)=﹣0.052.

那么方程x3+x2﹣2x﹣2=0的一个近似根可以为(精确度为0.1)(  )

A:1.2

B:1.35

C:1.43

D:1.5

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答案(点此获取答案解析)

C

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