Appoint all the pairs (k, l) (both k and l ) such that:
I'm really stuck at it. First of all, I think that getting rid of the roots may be a good idea so we have:
And I don't know what to do next.. Can I please get a little help?
I put the to WolframAlpha so that I can see how this function looks like and.. there are no answers. I mean - few of them are saying that l or k shoud be 0 which doesn't fit the requirements of the problem and the others are so extraordinarily long I seriously doubt they may be correct. What am I doing wrong?