Seven is the sole variety D for which the equation 2n − D = x2 has more than two alternatives for n and x pure. Especially, the equation 2n − seven = x2 is known as the Ramanujan–Nagell equation. We have been including additional on a regular basis. If you https://brookscjwgj.atualblog.com/44295764/facts-about-7-day-pill-organizers-revealed