OCR MEI Further Numerical Methods 2021 November — Question 1

Exam BoardOCR MEI
ModuleFurther Numerical Methods (Further Numerical Methods)
Year2021
SessionNovember
TopicSign Change & Interval Methods
TypeError Analysis in Approximations

1
    1. Determine the relative error when
      • 1.414214 is used to approximate \(\sqrt { 2 }\),
  1. \(1.414214 ^ { 2 }\) is used to approximate 2.
    (ii) Write down the relationship between your answers to part (a)(i).
  2. Fig. 1 shows some spreadsheet output.
  3. \begin{table}[h]
    ABC
    121.4142142
    \captionsetup{labelformat=empty} \caption{Fig. 1}
    \end{table} The formula in cell B1 is = SQRT (A1)
    and the formula in cell C 1 is \(\quad = \mathrm { B } 1 \wedge 2\).
    Ben evaluates \(1.414214 ^ { 2 }\) on his calculator and obtains 2.000001238 . He states that this shows that the value displayed in cell C1 is wrong. Explain whether Ben is correct.