Tuesday, November 22, 2011

Question:


Solve 5x^(-1/2) + 7 = 22?


Answer :

5/ x^(1/2) + 7 = 22

5 + 7x^(1/2) = 22x^(1/2)

5 = 15 x^(1/2)
1 = 3 x^(1/2)  --- squaring on both sides

1 = 9 x

x = 1/9


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2 comments:

  1. AnonymousNovember 22, 2011 at 4:07 PM

    how did the x^( -1/2 ) go from the 5 to the 7

    ReplyDelete
  2. Arun Kumar AutomationNovember 22, 2011 at 4:28 PM

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

    so it goes from numerator to denominator i.e 5 to 7

    ReplyDelete

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