An difríocht idir athruithe ar: "Monaplacht"

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Líne 26:
'''Sampla'''
 
Le feidhm mheánioncaim líneach <math>p(X) = a – bX</math> agus costais imeallaigh seasmhacha <math>c'(X) = c</math>
*agus costais imeallaigh seasmhacha <math>c' \pi(X) = p(X)X – c(X)</math>
*<math> \pi(X) = p(Xa - bX)X - c(X)cX</math>
*<math> \pi(X) = (aaX - bX)X^2 - cX</math>
*<math> \pi'(X) = aXa - bX^22bX - cXc = 0</math>
<math> \pi'(X) = a - 2bX - c = 0</math>
 
*<math>X = \frac{a - c}{2b}</math>