Answers edited by Shaun Y.

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• What is the domain and range of # f(x) = 2x^2 - 1#?
  
• How do you find the sum of the arithmetic series 2 + 5 + 8 + ... + 56?
  
• What is the vertex of #y= x^2-2x-2#?
  
• How do you find the number of roots for #f(x) = 4x^3 – 20x – 50# using the fundamental theorem of algebra?