document.write( "Question 635192: find a[20] when a[1]=9 and d=2 \n" ); document.write( "
Algebra.Com's Answer #400158 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,
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document.write( "find a[20] when a[1]=9 and d=2 
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document.write( "Arithmetic Sequence
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document.write( "\"+a%5Bn%5D+=+a%5B1%5D+%2B+%28n-1%29d\"
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document.write( "\"a%5B20%5D+=+9+%2B+19%2A2+=+47\" \n" );
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