ANG="en-US"><SPAN STYLE="font-style: normal">, (</SPAN></SPAN></FONT><FONT SIZE=5><SPAN LANG="en-US"><I>i=1,2,..., n</I></SPAN></FONT><FONT SIZE=5><SPAN LANG="en-US"><SPAN STYLE="font-style: normal">), from </SPAN></SPAN></FONT><FONT SIZE=5><SPAN LANG="en-US"><I>x=x</I></SPAN></FONT><SUB><FONT SIZE=5><SPAN LANG="en-US"><I>0</I></SPAN></FONT></SUB> <FONT SIZE=5><SPAN LANG="en-US"><SPAN STYLE="font-style: normal">to </SPAN></SPAN></FONT><FONT SIZE=5><SPAN LANG="en-US"><I>x=x</I></SPAN></FONT><SUB><FONT SIZE=5