C3_W2_Lab 2_Exercise 2, help for error

Course Q&A Machine Learning Specialization Unsupervised Learning, Recommenders, Reinforcement
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Thanks for the quick response

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Did you notice that your incorrect results are off by exactly the square root?

Did you use square root in your function?

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I did, not sure why I did there as well, since I now saw it was already below. Thanks a lot for the quick support. All works fine now. Really appreciate.