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a. Minimize z =-3x+4y subject to constra...

a. Minimize `z =-3x+4y` subject to constraints.
`x+2yle8`
` 3x+2yle12`
`xge0, yge0` by graphical method.
b. Prove that
`{:abs((1,a,a^2),(1,b,b^2),(1,c ,c^2)):} = (a - b)(b-c)(c-a)`

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