document.write( "Question 743007: The sequence an is defined recursively by the rules a0 = 0, a1 = 3, and for n is greater than or equal to 2,an = an-1 - an-2. What is the value of a4?? \n" ); document.write( "

Algebra.Com's Answer #452745 by davethejackal(28) $\"\"$ $\"About$

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Given
\n" ); document.write( " $\"+a%5B0%5D+=+0+\"$
\n" ); document.write( " $\"+a%5B1%5D=3+\"$
\n" ); document.write( " $\"+a%5Bn%5D=a%5Bn-1%5D-a%5Bn-2%5D+\"$ \r
\n" ); document.write( "\n" ); document.write( "Thus
\n" ); document.write( " $\"+a%5B2%5D+=+a%5B1%5D+-+a%5B0%5D+=+3+-+0+=+3+\"$
\n" ); document.write( " $\"+a%5B3%5D+=+a%5B2%5D+-+a%5B1%5D+=+3+-+3+=+0+\"$
\n" ); document.write( " $\"+a%5B4%5D+=+a%5B3%5D+-+a%5B2%5D+=+0+-+3+=+-3+\"$ \n" ); document.write( "

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