document.write( "Question 913200: My maths teacher gave the whole class this really..interesting question:\r
\n" ); document.write( "\n" ); document.write( "The reciprocal of which number is the same as the original number, subtract one. Prove it!\r
\n" ); document.write( "\n" ); document.write( "I am having a hard time fully understanding the question, but what I do understand is that a to get the reciprocal of a number, you simply divide it by one. That's as far as I have gotten.
\n" ); document.write( "I really need this because I could get 49% on my next assessment. If you could also explain how you worked it out, that would be absolutely amazing!
\n" ); document.write( "Thank You SO MUCH!!!
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Algebra.Com's Answer #554343 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
let x = unknown number\r
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\n" ); document.write( "\n" ); document.write( "x = original number
\n" ); document.write( "1/x = reciprocal of original number\r
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\n" ); document.write( "\n" ); document.write( "\"The reciprocal of which number is the same as the original number, subtract one.\" translates to \"1%2Fx+=+x-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"1%2Fx+=+x-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"1+=+x%2A%28x-1%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"1+=+x%5E2-x\"\r
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\n" ); document.write( "\n" ); document.write( "\"0+=+x%5E2-x-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-x-1=0\"\r
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\n" ); document.write( "\n" ); document.write( "Use the quadratic formula to solve for x\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-%28-1%29%2B-sqrt%28%28-1%29%5E2-4%281%29%28-1%29%29%29%2F%282%281%29%29\" Plug in \"a+=+1\", \"b+=+-1\", \"c+=+-1\" \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%281%2B-sqrt%281-%28-4%29%29%29%2F%282%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%281%2B-sqrt%281%2B4%29%29%2F%282%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%281%2B-sqrt%285%29%29%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%281%2Bsqrt%285%29%29%2F2\" or \"x+=+%281-sqrt%285%29%29%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+1.618034\" or \"x+=+-0.618034\" Use a calculator to evaluate the expressions\r
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\n" ); document.write( "\n" ); document.write( "So the number is either \"x+=+1.618034\" or \"x+=+-0.618034\" \r
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\n" ); document.write( "\n" ); document.write( "Let me know if you need more help or if you need me to explain a step in more detail.
\n" ); document.write( "Feel free to email me at jim_thompson5910@hotmail.com
\n" ); document.write( "or you can visit my website here: http://www.freewebs.com/jimthompson5910/home.html\r
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\n" ); document.write( "\n" ); document.write( "Thanks,\r
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\n" ); document.write( "\n" ); document.write( "Jim
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