(x- 1)(x- 1)(x+2)

Denominator = x4-4x+3 = (x-1) (x3+x2+x-3) =1

(x- 1)(x- 1)(x^2+2x+3)

The denominator of the numerator is reduced, and the rest is brought into x= 1, and the limit of 1/2 is obtained.

Question 2: The numerator and denominator are multiplied at the same time.

(number of radicals (n+2)+ number of radicals (n- 1)) (number of radicals (n+ 1)+ number of radicals (n)) Simplification

get

Molecule 3 (number of atoms (n+ 1)+ number of atoms (n))

Denominator (root sign (n+2)+ root sign (n+ 1))

So the limit =3