11. Suppose that a firm that uses 2 inputs has the production function f(x1, x₂) = = 12xx and faces the input prices (P₁, P2) and the output price 1. Show that f is concave for ₁> 0 and x₂ > 0, so that the firm's profit function , defined by (T1, 12) = f(x₁, x2) - P11 - P22, is concave.

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A: This is a problem of Linear Algebra.

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Q: 1. Compute u + v and u-2v where u = -5 and v = T 2

A: Note: Hi! Thank you for the question as per the honor code, we’ll answer the first question since…

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A: Solution :  Options (1) is correct

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