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Pure 2 coursework Change of sign method Finding a root by using change of sign method I will divide interval into a number to apply the change of sign method by using decimal search.. The two values are the new interval's two sides on the number axis and the roots must lie between these intervals. i am going to use the following equation to find out a root. it is clear that we can see the first interval lies on [1, 2]. Then i will use Excel. Value 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 In this method, I take increments in size 0.1 within the interval [1 , 2] Work out each value of and see whether the value is positive or negative. In this case, I will use Microsoft Exel to solve it. The diagram decimal research above shows how the sign change between [1.5,1.6]. Because of this, the interval of this equation will be [1.5,1.6]. The following graph can prove whether the interval...

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