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#1 Re: Help Me ! » Why Rationalize Infinite Limits » 2016-02-09 01:25:28

bobbym wrote:

The best response is can you do it another way and get the right answer?

Well my goal with inifinite limits - actually all limits - is evaluating what happens when you get closer and closer to a certain x and by rationalizing it I get a more basic function which shows me what truly happens at that point.

Maybe the better question is: If I rationalize this function the domain and range of a normal function is lost and a new function appears how can it be that it still hold the proper value that?

#2 Help Me ! » Why Rationalize Infinite Limits » 2016-02-08 06:20:03

Numerical
Replies: 17

Hello MathisFun forummers,

I stumbles accross this excercise:

and I was thinking why should I rationalize it? The book is very summier about explaining why it has to be rationalized and says it is also a possibility. In the answers it gets rationalized and I understand that I have to do it too, but I don't see the why!?

Thanks in advance

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