Question: Let u= (a1, a2, a3) be a fixed vector in R of length ||u|| = 1. Define a function f: R R by f(1,2,3)

Let u= (a1, a2, a3) be a fixed vector in R of

Let u= (a1, a2, a3) be a fixed vector in R of length ||u|| = 1. Define a function f: R R by f(1,2,3) =sinh(u x), where x = (1, 2, 3). Prove that f satisfies the partial differential equation af8f8f + + dx ax ax

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