Expression 2: "f" Subscript, 2 , Baseline left parenthesis, "m" , right parenthesis equals StartFraction, beta Superscript, alpha , Baseline Over Gamma left parenthesis, alpha , right parenthesis , EndFraction "m" Superscript, left parenthesis, alpha minus 1 , right parenthesis , Baseline "e" Superscript, left parenthesis, negative beta times "m" , right parenthesis , Baseline left brace, "m" greater than or equal to 0 , right brace Has graph. To audio trace, press ALT+T.f2m=βαΓαmα−1e−β·mm≥0