The Louvre Museum as seen through the Louvre Pyramid glass in Paris, France. From the National Geographic book The 10 Best of Everything. Smithsonian Institution, Washington, D.C. The Smithsonian is the worldâs largest research and museum complex, with 19 museums and galleries, the National Zoological Park, and various research stations.
1 An arithmetic sequence is a sequence with the difference between two consecutive terms constant. 2  The difference is called the common difference. 3  A geometric sequence is a sequence with the ratio between two consecutive terms constant. 4  This ratio is called the common ratio.
The sequence is a set of ordered numbers. The number of elements in the sequence can either be finite or infinite. More about Arithmetic Sequence (Arithmetric Progression). An arithmetic sequence is defined as a sequence of numbers with a constant difference between each consecutive term. It is also known as arithmetic progression. Arithmetic Sequnece â a1, a2, a3, a4, â¦, an; where a2 = a1 + d, a3 = a2 + d, and so on.