Question: Consider the function Find the relationship between the positive constants a and k such that is a joint density function of the continuous random

Consider the function

f(x, y) = [ke-(x+y)/a, 0, x 0, y 0 elsewhere.

Find the relationship between the positive constants a and k such that ƒ is a joint density function of the continuous random
variables x and y.

f(x, y) = [ke-(x+y)/a, 0, x 0, y 0 elsewhere.

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