Pick a preset function, then step through the method.
Bracket [a, b]
Initial guess
Ready.
Iterations
f(x)bracketmidpoint / root
Method
Bounds [a, b]
Approximation
–
True value*
–
Absolute error
–
Relative error
–
*"True value" is a high-precision numerical estimate (composite Simpson's rule, n = 20,000) used as the reference — not a symbolic closed-form integral.