Find restrictions needed for a and b and c

Reference no: EM131215194

A pair of random variables has a joint PDF specified by

f_X,Y(x,y) = dexp(-(ax²+bxy+cy²)).

(a) Find the constant in terms of ,a , b and c . Also, find any restrictions needed for a , b and c themselves for this to be a valid PDF.

(b) Find the marginal PDFs f_X(x) and f_Y(y).

Reference no: EM131215194

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