dharan wrote:

Solving this way consumes more time. We need to pick right numbers. And if we miss any of it, we dont get correct values.

Using inequality wavy curve method you can solve much early in a generic way [ w/o picking the numbers ]

Please search for wavy curve method in this forum or in google.

Hi there,

I understand the algebraic approach by Bunuel but I can't find my mistake using the wavy line method to test statement (2). When I draw \(\frac{(1−x^2)}{x^5} > 0\) or \(\frac{(1+x)(1-x)}{x^5} > 0\) I get the zero points -1, 1, and 0 (has to be excluded from final solution set) and as a result \(x>1\) and \(-1<x<0\).

I just discovered this method yesterday through the excellent post by

EgmatQuantExpert so I'm sorry if this comes across as a silly question

Thanks!

Edit: I found my mistake: Make sure that the factors are of the form (ax - b), not (b - ax) -> \(\frac{(1−x^2)}{x^5} > 0\) (=) \(\frac{( x^2-1 )}{x^5} < 0\) and then I get the right answer