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**1. Homework Statement**

A) lim as x-1 of x^2-x+1/x+1 =1/2

B)lim as x-0 of x^2 sin(1/x)=0

C) lim as x-1+ of 2^1/x-1=infinity

**2. Homework Equations**

By delta-epsilon proofs

**3. The Attempt at a Solution**

A) I took |f(x)-l| and could not factor out an x-1

B) I know that x^2 goes to 0 and that the compositions of functions have the same limit.

C) I have no clue how to evaluate limits from the right hand side!