Answer :

It is given in the question that,

Minimize and Maximize, Z = x + 2y

We have to subject on the following equation:

(x, y) = (100, 0), (0, 200)

(x, y) = (0, 50), (100, 0)

(x, y) = (0, 0), (50, 100)

∴ It is clear that at (0, 200) Z has its maximum value i.e. 400

Also, Z is minimum at two pints (0, 50) and (20, 40)

Hence, the value of Z will be minimum at all points joining (0, 50) and (20, 40)

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