An difríocht idir athruithe ar: "Monaplacht"
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Líne 28:
Le feidhm mheánioncaim líneach <math>p(X) = a – b*X</math>
agus costais imeallaigh seasmhacha <math>c'(X) = c</math>.
* <math> \pi(X) = p(X)*X – c(X)</math>
* <math> \pi(X) = (a - bX)X - cX</math>
* <math> \pi(X) = aX - bX^2 - cX</math>
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