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The three Rs: Reduce! Reuse! Recycle! There are lots of ways we can look after our planet. Three great ways are 'the three Rs': R educe! R euse! R ecycle! We throw away too many things and make too much rubbish. Lots of the things we throw in the bin take thousands of years to go away.
Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.
“Recycling” is the process of collecting and processing materials like paper, plastic, and glass so they can be turned into new products. It’s a way to give old items a new life instead of sending them to the landfill. On average, over 69 million tons are recycled in the United States.
In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . Many writers begin the sequence with 0 and 1, although some authors start it from 1 and 1 [1][2] and some (as did Fibonacci) from 1 ...
The Fibonacci sequence is an infinite sequence in which every number in the sequence is the sum of two numbers preceding it in the sequence, and it starts from 0 and 1. Learn the formula and understand its properties through examples.
The Hofstadter Figure-Figure (R and S) sequences are a pair of complementary integer sequences defined as follows [1] [2] = ; = = + (), >with the sequence () defined as a strictly increasing series of positive integers not present in ().The first few terms of these sequences are R: 1, 3, 7, 12, 18, 26, 35, 45, 56, 69, 83, 98, 114, 131, 150, 170, 191, 213, 236, 260, ...
