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frac{1}{2 - \sqrt{3}} = ? * \sqrt{3} - 2 * 2 + \sqrt{3} *

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frac{1}{2 - \sqrt{3}} = ? * \sqrt{3} - 2 * 2 + \sqrt{3} * [#permalink] New post 19 Oct 2008, 00:46
\frac{1}{2 - \sqrt{3}} = ?



* \sqrt{3} - 2
* 2 + \sqrt{3}
* \sqrt{2} + \sqrt{3}
* 2 - \sqrt{3}
* \sqrt{3} + 4
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Re: Another exponents [#permalink] New post 19 Oct 2008, 00:51
study wrote:
\frac{1}{2 - \sqrt{3}} = ?



* \sqrt{3} - 2
* 2 + \sqrt{3}
* \sqrt{2} + \sqrt{3}
* 2 - \sqrt{3}
* \sqrt{3} + 4


IMO B
multiply numerator and dino by 2+sgrt3
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Re: Another exponents [#permalink] New post 02 Nov 2008, 03:13
Can someone explain how do we get to the answer? Thanks.
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Re: Another exponents [#permalink] New post 02 Nov 2008, 03:23
1/(2-sqrt3) = 1/(2-sqrt3)*(2+sqrt3)/(2+sqrt3) = (2+sqrt3)/(4-3) = 2+sqrt3.
Re: Another exponents   [#permalink] 02 Nov 2008, 03:23
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frac{1}{2 - \sqrt{3}} = ? * \sqrt{3} - 2 * 2 + \sqrt{3} *

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