
#19
Aug1210, 09:31 AM

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#20
Aug1210, 09:49 AM

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P: 20,968

The title of your post is "Find Range, no need for calculus for this equation", yet you jumped right in and found the derivative of the function. ehild reports that this work is correct, but it isn't relevant to this problem, nor is any of what you did with complex numbers. All you need to do is FIND THE RANGE of the given function. To do that, set (3x  1)/(2x^{2} + x  6) = y, and solve for x. If the equation can be solved for x for any given (and real) y, the range of the function is all real numbers. 



#21
Aug1210, 10:14 AM

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#22
Aug1210, 01:56 PM

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P: 20,968

Whether there are critical points might be interesting, but seems to be irrelevant to this problem, if the thread title is any indication.



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