document.write( "Question 1210345: THE 2ND AND 7TH TERM OF A G.P ARE 18 AND 4374 RESPECTIVELY. FIND THE
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Algebra.Com's Answer #851976 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "I'll assume the student meant\r\n" );
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document.write( "THE 2ND AND 7TH TERM OF A G.P ARE 18 AND 4374 RESPECTIVELY. FIND THE \r\n" );
document.write( "1) COMMON RATIO \r\n" );
document.write( "2) FIRST TERM \r\n" );
document.write( "3) SUM OF THE 4TH AND 8TH TERM\r\n" );
document.write( "4) SUM OF THE FIRST 10 TERMS\r\n" );
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document.write( "1) COMMON RATIO \r\n" );
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document.write( "\"a%5B1%5D=a%2Ar%5E%282-1%29=ar=18\"\r\n" );
document.write( "\"a%5B7%5D=a%2Ar%5E%287-1%29=ar%5E6=4374\"\r\n" );
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document.write( "Divide the second equation term-by-term by the first equation.\r\n" );
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document.write( "\"%28a%5B6%5Dr%5E6%29%2F%28a%5B1%5Dr%29=4374%2F18\"\r\n" );
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document.write( "\"r%5E5=243\"\r\n" );
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document.write( "\"r+=+root%285%2C243%29\"\r\n" );
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document.write( "\"r+=+3\"\r\n" );
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document.write( "2) FIRST TERM \r\n" );
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document.write( "\"a%5B1%5Dr=18\"\r\n" );
document.write( "\"a%5B1%5D%2A3=18\"\r\n" );
document.write( "\"a%5B1%5D=18%2F3\"\r\n" );
document.write( "\"a%5B1%5D=6\"\r\n" );
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document.write( "3) SUM OF THE 4TH AND 8TH TERM\r\n" );
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document.write( "Using \"a%5Bn%5D=a%5B1%5D%2Ar%5E%28n-1%29\"\r\n" );
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document.write( "\"a%5B4%5D=a%5B1%5D%2Ar%5E%284-1%29=6%2A3%5E3=6%2A27=162\"\r\n" );
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document.write( "\"a%5B8%5D=a%5B1%5D%2Ar%5E%288-1%29=6%2A3%5E7=6%2A2187=13122\" \r\n" );
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document.write( "\"a%5B4%5D%2Ba%5B8%5D=+162%2B13122=13284\"\r\n" );
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document.write( "4) SUM OF THE FIRST 10 TERMS\r\n" );
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document.write( "\"S%5Bn%5D=a%5B1%5D%2Aexpr%28%28r%5En-1%29%2F%28r-1%29%29%29\"\r\n" );
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document.write( "Edwin
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