5.21.
Санамсаргүй хэмжигдэхүүний эхний 3 эрэмбийн анхны ба төвийн моментуудыг ол.
(a) $f(x)=\left\{\begin{array}{lc}
0 & x\leq 1\\
6/x^7 & x>1
\end{array}\right.
$ (b) $f(x)=\left\{\begin{array}{lc}
0 & x\leq 1 \\
4/x^5 & x>1\\
\end{array}\right.
$ (c) $f(x)=\left\{\begin{array}{lc}
0 & x\leq 1 \\
5/x^6 & x>1\\
\end{array}\right.
$
0 & x\leq 1\\
6/x^7 & x>1
\end{array}\right.
$ (b) $f(x)=\left\{\begin{array}{lc}
0 & x\leq 1 \\
4/x^5 & x>1\\
\end{array}\right.
$ (c) $f(x)=\left\{\begin{array}{lc}
0 & x\leq 1 \\
5/x^6 & x>1\\
\end{array}\right.
$
