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Which of the following are valid reasons for using feature scaling? (a) It speeds up solving for using the normal equation. (b) It prevents the
Which of the following are valid reasons for using feature scaling? (a) It speeds up solving for using the normal equation. (b) It prevents the matrix XTX (used in the normal equation) from being non- invertable (singular/degenerate). (c) It speeds up gradient descent by making it require fewer iterations to get to a good solution. (d) It is necessary to prevent gradient descent from getting stuck in local optima
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