T - IfB

Regula falsiTake two starting values x 1 and x 2with f (x 1 ) < 0 and f (x 2 ) > 0.Approximate f by a straight line betweenf (x 1 ) and f (x 2 ) and calculate its root as:x m = (f((x 1 ) x 2 – f (x 2 ) x 1 ) / (f (x 1 ) – f (x 2 )).If sign(f (x m )) = sign(f (x 1 )), thenreplace x 1 by x m otherwise replace x 2 by x m .Regula falsi7980