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Pls answer all blanks thanks. A proposed formula for an electomagnetic wave is given below: f(x,t) = 2 Sin(9 X - 7 t) What is

Pls answer all blanks thanks.

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A proposed formula for an electomagnetic wave is given below: f(x,t) = 2 Sin(9 X - 7 t) What is the first derivative of this function with respect to x? What is the second derivative of this function with respect to x? What is the first derivative of this function with respect to t? What is the second derivative of this function with respect to t? Does this satisfy the wave equation? If yes, answer with the wave speed. If no, type in NAN m/s

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