Question: For a given iteration of the Bisection method the absolute relative approximate error is defined as Ea = | xm x m | / xm

For a given iteration of the Bisection method the absolute relative approximate error is defined as
Ea =|xm xm|/xm,
where xm is the estimate from the previous iteration. Show that
Ea =|xl xu|/(xl + xu),
Hint: use a proof by cases on the case of when xl = xm, and on the case of when xu = xm.

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