⑩天掌 Teaching Plan on Advanced Mathematics o 取F(;;)=P(5,m)+Q(号,m), F(5;,2) y △W≈F(5;,mh)M=1M1 即△W1≈P(5,m)Ax1+Q(5,m)y 求和W=∑△W 近似值 ≈∑P,mn)△x+Q(51,m)·4y i=1 取极限W=lim∑P6,m)△x,+Q(5,m)4y 精确值 tianjin Polytechic lmiwendity NwwTianjin Polytechnic University Teaching Plan on Advanced Mathematics 求和 [ ( , ) ( , ) ]. 1 =    +   n i i i i i i i P   x Q   y 取极限 lim [ ( , ) ( , ) ]. 1 0 = → =   +   n i i i i i i i W P   x Q   y  近似值 精确值 F( , ) P( , )i Q( , ) j, i i i i i i   取   =   +   ( , ) , Wi F i i Mi−1Mi      ( , ) ( , ) . i i i i i i i 即 W  P   x + Q   y = =  n i W Wi 1 o x y A B L Mn−1 Mi Mi−1 M2 M1 ( , ) F  i i xi i y