7 is the only real quantity D for which the equation 2n ? D = x2 has in excess of two remedies for n and x all-natural. Especially, the equation 2n ? seven = x2 is referred to as the Ramanujan–Nagell equation.The island of Ogygia was the home of The attractive nymph named Calypso. She fell madly in like with Odysseus and promised him immortality … Read More