How to understand Lambda1 and Lambda2 for Box Cox transformation ?

[#1]

What do Lambda1 and Lambda2 mean when specify parameters for Box Cox transformation? How to specify them?

I have searched Box Cox formula in Help. It has only one Lambda parameter in formula. So I'm confusing.

Thank you!

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[#2 · Accepted solution]

JMP's Box-Cox function (as opposed to the B-C transformation in linear models, as you show above) is based on the following. 

https://en.wikipedia.org/wiki/Power_transform.

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[#3]

Thank you!