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Find an equation?

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1 Answer

 f(x) = 1/(x + k)
 f'(x)  = -1/ (X + k)2      g(x) =the function which is perpendicular to f(x)
 
 
    g' ( X) = -1/ f'(x)  = -1 / ( -1/ x +k)2= (X +k) 2
 
     g(x) = ∫ ( X + k) ^2) dx =  1/3 ( X + k ) 3 + C     

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