document.write( "Question 420010: I've been trying this problem for a while now. Please help me find the sum of the geometric sequence where:
\n" ); document.write( " a sub4=24 and a sub9= 768 and n=9. \r
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Algebra.Com's Answer #293731 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "Hi
\n" ); document.write( "geometric sequence
\n" ); document.write( "\"a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29\"
\n" ); document.write( "\"a%5B4%5D+=+a%5B1%5D%2Ar%5E3+=+24\" \"a%5B1%5D+=+24%2Fr%5E3\"
\n" ); document.write( "\"a%5B9%5D+=+a%5B1%5D%2Ar%5E8=+768\"
\n" ); document.write( " 24/r^3 *r^8 = 768
\n" ); document.write( " r^5 = 32
\n" ); document.write( " r = 2 and \"a%5B1%5D+=+3\"
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