| http://www.w3.org/ns/prov#value | - Please use lower-case letters, such as 'a', instead of upper-case letters for names you devise. (To avoid clashes with built-in Mathematica names, all of which begin with '$' or else an upper-case letter.) Thus you should use for your equation: x + 1/(1 + r^x) + a == 0Are r and a supposed to be real, or would complex values be OK?
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