document.write( "Question 1179160: 20.Please help with this problem
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Algebra.Com's Answer #808669 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "If the information given below represents a geometric sequence , find . \"a%5B3%5D\"?\r
\n" ); document.write( "\n" ); document.write( "\"a%5B1%5D=3645\"
\n" ); document.write( "\"a%5B6%5D=15\"\r
\n" ); document.write( "\n" ); document.write( "formula for nth term of a geometric sequence:\r
\n" ); document.write( "\n" ); document.write( "\"a%5Bn%5D=a%5B1%5D%2Ar%5E%28n-1%29\"\r
\n" ); document.write( "\n" ); document.write( "use given to find common ratio \"r\"\r
\n" ); document.write( "\n" ); document.write( "\"15=3645%2Ar%5E%286-1%29\"\r
\n" ); document.write( "\n" ); document.write( "\"15%2F3645=r%5E5\"\r
\n" ); document.write( "\n" ); document.write( "\"r%5E5=1%2F243\"\r
\n" ); document.write( "\n" ); document.write( "\"r=root%285%2C1%2F243%29\"\r
\n" ); document.write( "\n" ); document.write( "\"r=1%2Froot%285%2C243%29\"\r
\n" ); document.write( "\n" ); document.write( "\"r=1%2Froot%285%2C3%5E5%29\"\r
\n" ); document.write( "\n" ); document.write( "\"r=1%2F3\"\r
\n" ); document.write( "\n" ); document.write( "\"a%5Bn%5D=3645%2A%281%2F3%29%5E%28n-1%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"a%5B3%5D=3645%2A%281%2F3%29%5E%283-1%29\"\r
\n" ); document.write( "\n" ); document.write( "\"a%5B3%5D=3645%2A%281%2F3%29%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"a%5B3%5D=405\"\r
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