Generalize be moivre's procedure in problem III(of his text)to solve problemIV: to find how many trials are necessary to make it equally probable that a event will happen twice , supposing that a is the number of chances for its happening in any one trial and b the number of chances for its failing. (Hint b^x + xab^x-1 is the number in which the evebt may succeed no more than once, while (a+b)^x is the total number of chances) aporoximate the solution for the case a:b = 1:q, with q large and show that x is about 1.678q