document.write( "Question 624868: John saves Nu. 2 in january, Nu. 6 in february, Nu. 18 in march and so on. The total saving in one year by John is how much? \n" ); document.write( "
Algebra.Com's Answer #393124 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,
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document.write( "John saves Nu. 2 in january, Nu. 6 in february, Nu. 18 in march and so on.
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document.write( " \"a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29\" , r = 3
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document.write( " \"a%5Bn%5D+=+2%2A3%5E%28n-1%29\"
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document.write( "\"S%5Bn%5D+=++a%5B1%5D%28%281-r%5En%29%2F%281-r%29%29\"
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document.write( "\"S%5B12%5D+=++2%28%281-3%5En%29%2F%28-2%29%29=+531440\" \n" );
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