1. Use the techniques for curve sketching that you think are appropriate to sketch the curve defined f(x)=(4-x^2)/(x^2-1). Label all key information. (limit analysis, find limit approaches -1 from the left, -1 from the right, f(-1)=?, +1 from the left, and +1 from the right, f(+1)=?
2. Solve the following equations and each of the variable
1. 3a-2b+c=0
2. 0=3a+b
3. 2=a+b+c+d
4. 3= -a+b-c+d
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