document.write( "Question 919168: the second term of the geometric series is 2 and 12th term is 1/256 then the first term is?\r
\n" ); document.write( "\n" ); document.write( "A)4
\n" ); document.write( "B)2
\n" ); document.write( "C)1
\n" ); document.write( "D)8
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Algebra.Com's Answer #557592 by MathLover1(20850)\"\" \"About 
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given:
\n" ); document.write( "the second term of the geometric series is \"2\" and 12th term is \"1%2F256\" then the first term is\r
\n" ); document.write( "\n" ); document.write( "Form: \"a%28n%29+=+ar%5E%28n-1%29\"
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\n" ); document.write( "\"a%2812%29+=+ar%5E11+=+1%2F256\"
\n" ); document.write( "\"a%282%29+=+ar+=+2\"\r
\n" ); document.write( "\n" ); document.write( "Divide a(12) by a(2) to solve for \"\"r\"\":\r
\n" ); document.write( "\n" ); document.write( "\"ar%5E11%2Far=%281%2F256%29%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"cross%28a%29r%5Ecross%2811%29%5E10%2Fcross%28a%29cross%28r%29=%281%2F256%29%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"r%5E10+=+1%2F512\"\r
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\n" ); document.write( "\n" ); document.write( "\"r%5E10+=+0.001953125\"\r
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\n" ); document.write( "\n" ); document.write( "\"r+=+root%2810%2C0.001953125%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"r+=+0.5263157894736842\" or proximately\r
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\n" ); document.write( "\n" ); document.write( "\"r+=+0.5\" or \"r=1%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "go to \"ar+=+2\", plug in \"r=1%2F2\" and solve for \"a\"\r
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\n" ); document.write( "\n" ); document.write( "\"a%281%2F2%29=+2\"\r
\n" ); document.write( "\n" ); document.write( "\"a=+2%2A2\"\r
\n" ); document.write( "\n" ); document.write( "\"a=+4\"\r
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\n" ); document.write( "\n" ); document.write( "answer: A)\"4\"\r
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