freeCodeCamp/curriculum/challenges/chinese/11-machine-learning-with-py.../tensorflow/neural-networks-activation-...

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---
id: 5e8f2f13c4cdbe86b5c72d93
challengeType: 11
videoId: S45tqW6BqRs
---
# --question--
## --text--
Which activation function switches values between -1 and 1?
## --answers--
ReLU (Rectified Linear Unit)
---
Tanh (Hyperbolic Tangent)
---
Sigmoid
## --video-solution--
2
# --hints--
# --solutions--