seven is the sole quantity D for which the equation 2n ? D = x2 has a lot more than two methods for n and x normal. Especially, the equation 2n ? seven = x2 is referred to as the Ramanujan–Nagell equation.Needless to say There exists also the properly-acknowledged story of Pharaohs dream in regards to the seven Unwanted fat cows and 7 slender cow… Read More