Syntax for defining and using functions in W|A ?

Questions
1

Hello,

Under W|A how can I set the function f(x) = x^3 and ask W|A to compute f(abs(x)), f(x^3), or f(3)?

Thanks,
Bill

2

I do not believe there are user defined functions supported in Wolfram Alpha.

You can write out the function definition with the argument inserted in each case.

3

Thank you. I was wondering about that. The idea of natural language processing is great but if one doesn’t know the “language” well (e.g. keywords, function, etc), then NLP can be a guessing game.. I not sure if the W|A “language” is even fully documented.

Bill