... dänghudng:a. v2r= *.*.*=oox- oy- ü,'b. 9I = avrT +.9r0"c cpc v2r= *. 19* 4***=o0r" r Ar r" 0q' 0z'd. vzr= *.?+. 19[ fr-u,)+l t azrdrz r & y- o$L ... v2r=4I* **tl=o0x' Ay" 0z'b. 9I = uv,T + 9r&cpc. v2r= t7*L{*!{l*tl=oAr' r 0r r' 0q' 02"d. v2r= *.?+. 49[ f,-p,P!l* =, I =,ä'T =oOrz r Or ... Ax' cp A. - -[ Ax' ' il, ' Ar, )' ' # =r'r, d. 9I = yrla 9& quot;.Cäu (A33):Phrrong trinh näo sau däy äp dung thich hdp nhä't cho vät...