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[USING R] Write a function bisect(f, lower, upper, tol = 1e-6) to find the root of...

[USING R] Write a function bisect(f, lower, upper, tol = 1e-6) to find the root of the univariate function f on the interval [lower, upper] with precision tolerance =< tol (defaulted to be 10-6 ) via bisection, which returns a list consisting of root, f.root (f evaluated at root), iter (number of iterations) and estim.prec (estimated precision). Apply it to the function

f(x) = x3 - x - 1

on [1, 2] with precision tolerance 10-6 . Compare it with the built-in function uniroot.

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