Question:

Find all real solutions to the equation (algebra)?

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1/(x-1) + 1/(x^2) = 0

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  1. Hmmm...


  2. First step is to solve the left hand side with a common denominator as (x-1)(x^2).

    Then,  1/(x-1) = (x^2)/(x-1)(x^2) and

              1/(x^2) = (x-1)/(x-1)(x^2)

    Next, solve the left hand side as:

       [x^2 + (x-1)] / [(x-1)(x^2)]

    = (x^2 + x - 1) / [(x-1)(x^2)]

    = [(x-2)(x+1)] / [(x-1)(x^2)]

    Finally, you place this back to your equation:

       [(x-2)(x+1)] / [(x-1)(x^2)] = 0

    In order for this to be equal to 0, either (x-2) = 0 or (x+1) = 0 but make sure (x-1) not = 0 and (x^2) not = 0 (because nothing can be divided by 0).

    So, x = 2 or x = -1 given that x != 1 and x != 0

        

  3. Your question --

    1/(x-1) + 1/(x^2) = 0 ,  Simplify the left hand side by taking LCM of the denominator.

    =>   ( x^2  +  x  -  1 ) / [ x^2 ( x - 1 ) ]  =  0 , Now cross multiply

    =>  x^2  +  x  -  1  =  0

      

    =>  x  =  (1/2) [  - 1  Ã‚±  Ã¢ÂˆÂš(1+4)  ]  =  (1/2)  [  - 1  Ã‚±  2.236  ]

    =>  x  =  + 0.618  or  - 1.618 ........................ Answer

    Dr. PKT


  4. 1/(x-1) + 1(x^2) = 0

    So,

    (x-1) = 0

    x = 1

    OR

    (x^2) = 0

    x = 0

    So the answer is x = 0,1

  5. does the "/" mean to multiply or divide i forget...:-x

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