100& = &\lim_x\to44(*f*(*x*))^{2} & = &4\lim_x\to4(*f*(*x*))^{2} & = &4(\lim_x\to4*f*(*x*))^{2} 25& = &(\lim_x\to4*f*(*x*))^{2} ± 5& = &\lim_x\to4*f*(*x*). It's important to notice that because of the square, there are two different possible values for the limit. |