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**1. The problem statement, all variables and given/known data**

a. lim

x→0

(x^3 − 2x + 7)/(3x^2 − 3)

b. lim

x→-1

1/(x+1)

**2. Relevant equations**

**3. The attempt at a solution**

For a. I obtained a limit of 7/-3

For b. the limit does not exist

(I really unsure about this)