131. The rule is Un = (8n3 - 36n2 + 64n - 27)/3 for n = 1, 2, 3, ...
64n = 25n is the percentage, so, we solve for it. In the above equation, dividing by 64 is the most suitable.n = 25/64Simplifying into a percent, we have:0.390625 = 39.0625%.
8n(5n+8)
40n^2 + 64n = n(40n + 64) = 8n(5n + 8)
8n squared by inspection
8n
Assuming you meant 7n (not just 7 at the end of your question) - first... simplify the equation. Numbers raised to powers get priority - so your new sum is... 5n - 64n + 25n + n + 7n.... This simplifies to... -26n
The city at 64N 51W coordinates is Nuuk, the capital of Greenland.
The coordinates 64N 22W point to the city of Reykjavik in Iceland.
8n^2
64 North, 22 West
64N latitude 21W longitude corresponds to a location in the Atlantic Ocean, approximately halfway between the northern coast of Scotland and the southern coast of Greenland. This area is often characterized by cold temperatures and rough seas due to its proximity to the Arctic Circle.
The coordinates are a little bit off, but it puts you in the vicinity of Nuuk, Greenland.
131. The rule is Un = (8n3 - 36n2 + 64n - 27)/3 for n = 1, 2, 3, ...