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i need help an the question is x=2+1/x

 Aug 28, 2014

Best Answer 

 #2
avatar+33654 
+5

If this is the equation x = 2 + (1/x) then first multiply through by x to get:

x2 = 2x + 1

Rearrange:

x2 - 2x - 1 = 0

Solve using the quadratic formula:

x22×x1=0{x=12x=2+1}{x=0.414213562373095x=2.414213562373095}

 Aug 29, 2014
 #1
avatar+4473 
+5

This doesn't make sense. How can x = something that has x.

If x = 1: 1 = (2+1)/1 ? NO & 1 = 2 + (1/1) ? NO.

 

Also, parentheses are very important! Is it (2+1)/x or 2+(1/x)?

 Aug 29, 2014
 #2
avatar+33654 
+5
Best Answer

If this is the equation x = 2 + (1/x) then first multiply through by x to get:

x2 = 2x + 1

Rearrange:

x2 - 2x - 1 = 0

Solve using the quadratic formula:

x22×x1=0{x=12x=2+1}{x=0.414213562373095x=2.414213562373095}

Alan Aug 29, 2014

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