text: The exact value sought can be given by formula_5 which can be simplified with Big O notation to be formula_6 Using the step sizes "h" and "h / t" for some "t", the two formulas for "A" are: formula_7 formula_8 Multiplying the second equation by "tk"0 and subtracting the first equation gives formula_9 which can be solved for "A" to give formula_10 By this