The softmax function for classes is given by

.

It transforms a vector of real values into a probability mass vector for a categorical distribution. It is often used in conjunction with the cross-entropy loss

- Find a simplified expression for when .
- Differentiate with respect to .
- Differentiate with respect to .

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What is the variable k in Q1 ?

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I considered it the number of classes.

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I think it should be m, it is just a mistake.

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it gives sigmoid function as in Q5.

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1. sigmoid

2.

3.

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