设
，则随机变量
的概率密度函数为()。
0. \\ 0, & t_{m}0. & \end{cases}" data-width="286" data-height="71" data-size="4591" data-format="png" style="">
0. \\ 0, & t_{\mathrm{m} }0. & \end{cases}" data-width="302" data-height="70" data-size="4579" data-format="png" style="">
0.\\0,&t_{m}\:0.\end{cases}" data-width="268" data-height="71" data-size="4643" data-format="png" style="">
证明：当x>1时，ln x+dfrac (4)(x+1)-2gt 0 0" data-width="196" data-height="46" data-siz
01 + x ^ 2 , x le 0." data-width="202" data-height="53" data-size="4250" data-fo
" data-width="652" data-height="91" data-size="17032" data-format="png" style="m
设y=y(x)满足方程 y=y(x) 0 ) " data-width="252" data-height="33" data-size="2950" data
设总体X服从参数为0)" data-width="76" data-height="25" data-size="1382" data-format="png"
证明:当x>0时,有不等式^2xgt x+sin x+cos xx+sin x+cos x" data-width="203" data-height="26"
由于chi_(0.975)^2(5chi_(0.05)^2(5), 认为纤度总体方差不正&常 end (aligned)" data-width="40
end (aligned)" data-width="374" data-height="125" data-size="16137" data-format=
end (aligned)" data-width="395" data-height="189" data-size="33520" data-format=
真空中有一均匀带电球面，半径 ，带电量为 0)" data-width="88" data-height="26" data-size="1788" data-