Monday, May 11, 2015

Sequence and series.

A sequence is consist with elements and a list of numbers.   a series is a list of numbers adding together.  There are wo types of sequence and series , arithmetic and geometric. Arithmatic means that the elements are related by addition. Geometeic means that the slements are related by multiplication. Arithmetic formula is An= A1+(n-1)d.  A1represents the first term of the series. And d is the difference between two terms. N means the nth term.   Geometric formula is An=A1*r^(n-1)   A1is the first term and r is the rate of two terms.  We can get r by dividing any two terms next to each other. We can write eries  into summation formation.    


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