..., 2.1
A function $f(t)$ is said to be piecewise continuous on the interval $[a,b]$ if the function satisies the following conditions: (i) $f(t)$ is continuous on the intervval $[a,b]$ except at finite number of points.
(ii) The left-hand limit and the right-hand limit exist at discontinuous point $t_{0}$ of $f(t)$. 
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.