It is impossible

$\large L=\displaystyle\lim_{x \to -1}\dfrac{\displaystyle\prod_{r=1}^{4n}(1+(-1)^{r+1}x^r)}{\displaystyle\prod_{r=1}^{2n}(1+(-1)^{r+1}x^r)^2}$

Find the value of $$L$$. 

Notation: $$\dbinom MN$$ denotes the binomial coefficient, $$\dbinom MN = \dfrac{M!}{N!(M-N)!}$$.

×

Problem Loading...

Note Loading...

Set Loading...