(x-1)(x+1)(√x+1) (x-1)(x+1)(√x+1)
...=lim = lim = lim (x+1)(√x+1)=(1+1)(√1+1)=2*2=4
x-->1 (√x-1)(√x+1) x-1
(x-1)(x+1)(√x+1) (x-1)(x+1)(√x+1)
...=lim = lim = lim (x+1)(√x+1)=(1+1)(√1+1)=2*2=4
x-->1 (√x-1)(√x+1) x-1