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))#?