(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