Fill in the blank. The symbols C₁, C₂, and k represent constants. - (C₂ sin kx + C₂ cos kx) = −k² C₁sin kx + С₂cos kx Write this result as a linear second-order differential equation that is free of the symbols C₁ and C₂ and has the form F(x, y") = 0. (Use ypp for y".) "+k²y = 0

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