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Let X1 and X2 be independent standard normal random variables. If Y1 = X1 + 2X2 and Y2 = 2X1 X2, find fyl'ya (l, 2).

Let X1 and X2 be independent standard normal random variables. If Y1 = X1 + 2X2 and Y2 = 2X1 X2, find fyl'ya (l, 2). (Please enter your answer as a decimal, correct to three places.) Check

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