freeCodeCamp/curriculum/challenges/chinese/11-machine-learning-with-python/tensorflow/neural-networks-optimizers.md

---
id: 5e8f2f13c4cdbe86b5c72d94
challengeType: 11
videoId: hdOtRPQe1o4
---

# --question--

## --text--

What is an optimizer function?

## --answers--

A function that increases the accuracy of a model's predictions.

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A function that implements the gradient descent and backpropagation algorithms for you.

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A function that reduces the time a model needs to train.

## --video-solution--

2

# --hints--


# --solutions--