f(x, y) = ce−(2x2+6xy+3y2), −∞ < x < ∞, −∞ < y < ∞

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Can the following be a density function (give reasons):
f(x, y) = ce−(2x2+6xy+3y2), −∞ < x < ∞, −∞ < y < ∞
where c is a positive constant.

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