SOLUTION: How to solve for x? a)(4x+2)^-1 < 0 b)0 < (2x-4)^-1 < 1/2

That is only true if the denominator is negative:









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We must requre that the denominator  be positive,
so that we can multiple through by it without changing the order
of the inequality:

This requirement is 









With this requirement, we multiply through by the LCD = 







which is the same as 



which is consistent with the requirement 

so the solution is 



Edwin