Question

I need help rationalizing the numerator of:
(1 + cx^2-sqrt(1+x^2))/x^4

Answer 1

but then you'll have a sqrt. in the denominator?

Answer 2

There's no other way?

Answer 3

if you only want to rationalize the numerator regardless od the denominator you could multiply by (1+cx^2+sqrt(1+x^2))/(1+cx^2+sqrt(1+x^2))

Answer 4

The intent is to evaluate the limit as x approaches 0, & to find all values of c for which the limit exists

Answer 5

limits aren't my thing,wait for the big guys to help you with that:)