Questions asked by MM

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• What is the range of the function ?
  
• If `4-x^2>=0` isn't `x<=+-2`? I don't understand how `-2<=x<=2` is a result.
  
• What is the range of `sqrt (4-x^2)`?
  
• Find `lim x->0 (h^3+2h^2-7h)/h`?
  
• Is the function `(x^3+1)/x` odd, even or neither?
  
• My textbook says that `lim x-> - oo (x^2+x+3)/x^2` is >1 from below. I thought is was from above. Which one is correct?
  
• How do you find the range of `y = 1 + (x/(x^2+1))`?