(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
3^n-2 * 5^n / 15^n-2 = 0.2^n-2 * 5^n = (1/5)^n-2 * (1/5)^-n = (1/5)^-2 = 5² = 25
Решение во вложении---------------------------------