4. Find the intersecting point of the following lines in the three-dimensional space using determinants: x + 2y + 3z = -4 2x + y + 4z = 8 x + 3y + 5z = 0

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A: Here is the solution:

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A: The given graph of f' is:

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A: Let's find minimum and maximum value of function by using Lagrange multipliers.