document.write( "Question 814154: the tird term of ageometrical progression is 63 and the fifth term is 567.find the sum of the first terms of the progression. \n" ); document.write( "
Algebra.Com's Answer #490112 by josgarithmetic(39620)\"\" \"About 
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r = the ratio between terms\r
\n" ); document.write( "\n" ); document.write( "a = initial term of the sequence\r
\n" ); document.write( "\n" ); document.write( "a, ar, ar^2, ar^3 would be
\n" ); document.write( "a, ar, 63, ar^3, 567.\r
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\n" ); document.write( "\n" ); document.write( "The way to go from 63 to 567 is \"63%2Ar%2Ar=567\".
\n" ); document.write( "\"r%5E2=567%2F63\"
\n" ); document.write( "\"r%5E2=9\"
\n" ); document.write( "\"highlight%28r=3%29\"
\n" ); document.write( "From this, find that \"highlight%28a=7%29\".\r
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\n" ); document.write( "\n" ); document.write( "You should be able to finish getting the answer to your question using your lower-level skills from the found values for a and r.
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