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| rev | Bot | (Created page with "<div class="d-none"><math> \newcommand{\NA}{{\rm NA}} \newcommand{\mat}[1]{{\bf#1}} \newcommand{\exref}[1]{\ref{##1}} \newcommand{\secstoprocess}{\all} \newcommand{\NA}{{\rm NA}} \newcommand{\mathds}{\mathbb}</math></div> Assume that <math>X_1</math> and <math>X_2</math> are independent random variables, each having an exponential density with parameter <math>\lambda</math>. Show that <math>Z = X_1 - X_2</math> has density <math display="block"> f_Z(z) = (1/2)\la...") | Jun 9'24 at 3:27 | +501 |