document.write( "Question 503508: If I have the following numbers:\r
\n" ); document.write( "\n" ); document.write( "2,6,12,20,30,42...\r
\n" ); document.write( "\n" ); document.write( "I can see the relationship between the numbers:
\n" ); document.write( " +4 +6 +8 +10 +12
\n" ); document.write( " +2 +2 +2 +2\r
\n" ); document.write( "\n" ); document.write( "What kind of sequence is this? (arithmetic/geometric etc) \r
\n" ); document.write( "\n" ); document.write( "Thank you! \n" ); document.write( "

Algebra.Com's Answer #339270 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( "The two main types of series/sequences are $\"arithmetic\"$ and $\"geometric\"$ . Some sequences are $\"neither\"$ of these. \r
\n" ); document.write( "\n" ); document.write( "It’s important to be able to identify what type of sequence is being dealt with.\r
\n" ); document.write( "\n" ); document.write( "And $\"arithmetic\"$ series is one where $\"each\"$ $\"+term\"$ is equal the one before it $\"plus\"$ $\"+some\"$ number. For example: 5, 10, 15, 20, … Each term in this sequence equals the term before it with $\"5\"$ added on. \r
\n" ); document.write( "\n" ); document.write( "In contrast, a $\"geometric\"$ $\"+sequence\"$ is one where each term equals the one before it $\"multiplied\"$ by a $\"certain\"$ $\"value\"$ . An example would be 3, 6, 12, 24, 48, … Each term is equal to the prior one multiplied by $\"2\"$ . \r
\n" ); document.write( "\n" ); document.write( "so, it's $\"neither\"$ of these \n" ); document.write( "

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