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The sum of the 1st nine terms of an arithmetic series is 216. The 1st,3rd and the 7th terms of series form the 1st three terms of a geometric series. Find the 1st term and the constant difference of the arithmetic series ?
asked by mpho makua on August 14, 2016 
Math
Consider the following series: 1,2,3,4,5,10,20,40....which starts as an arithmetic series? ...but after the first five terms becomes a geometric series. Prove that any positive integer can be written as a sum of distinct numbers
asked by MO on May 17, 2016 
tricky math
consider the right triangle with sides 3,4,5. Notice that the lengths of the sides form an arithmetic sequence. a. determine three other right triangles wtih side lengths in arithmetic sequence. b.let the sides of a right triangle
asked by Aerial on December 21, 2006 
Math
Using the index of a series as the domain and the value of the series as the range, is a series a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is
asked by Vianna on October 28, 2006 
arithmetic
In an arithmetic series, the terms of the series are equally spread out. For example, in 1 + 5 + 9 + 13 + 17, consecutive terms are 4 apart. If the first term in an arithmetic series is 3, the last term is 136, and the sum is
asked by Cennie on September 24, 2010 
Algebra
In an arithmetic series, the terms of the series are equally spread out. For example, in 1 + 5 + 9 + 13 + 17, consecutive terms are 4 apart. If the first term in an arithmetic series is 3,the last term is 136, and the sum is
asked by Daniel on July 14, 2009 
Algebra
Using the index of a series as the domain and the value of the series as the range, is a series a function? Include the following in your answer: Which one of the basic functions (linear, quadratic, rational, or exponential) is
asked by V on October 29, 2006 
Math
An arithmetic series has first term 50 and common difference 4. How many terms are in the series so that the sum of the series first exceeds 100?
asked by Lucas on November 24, 2017 
math studies
An arithmetic series has a first term of 4 and a common difference of 1. A geometric series has a first term of 8 and a common ratio of 0.5. After how many terms does the sum of the arithmetic series exceed the sum of the
asked by ll on September 28, 2008 
Induction
Given the series 1,2,3,4,5,10,20,40,80,..... which starts as an arithmetic series for the first five terms and then follows geometric series. It can be proved by strong induction that any positive integer can be written as a sum
asked by bcruga on September 28, 2017