An identity Show that if f 1x, y2 = ax + by cx + dy ,
Chapter 12, Problem 94(choose chapter or problem)
An identity Show that if f 1x, y2 = ax + by cx + dy , where a, b, c, and d are real numbers with ad - bc = 0, then fx = fy = 0, for all x and y in the domain of f. Give an explanation.
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