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I'm working with the sigmoid function which is written

1/(1 + e^-t)

While plugging this in to wolfram alpha, I noticed an alternate way to write it is

1 - 1/(1 + e^t)

I can't for the life of me figure out how to go about rewriting it in the alternate form. Would anyone be able to give me a hint on how to go about rewriting it this way? Or even better point me at some material that will help me figure it out? Thanks

Here is the link to wolfram alpha

http://www.wolframalpha.com/input/?i=1/(1+++exp(-t))

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# Sigmoid function

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