高阶显式龙格一库塔法构造 y1=y,+元k+元k+.+九k k =hf(x,y.) k,=hf(x,ta,h,y +B.k) k=hf(x,tah,yk+Bk,) kn=hf(xn+nhyn+阝nmk+阝k,+.+Bnm-kn-i) 高阶显式龙格—库塔法构造           = + + + + + = + + + = + + = = + + + + − − + ( , ) ( , ) ( , ) ( , ) 1 1 2 2 , 1 1 3 3 3 1 1 3 2 2 2 2 2 1 1 1 1 1 1 2 2 m n m n m m m m m n n n n n n n n m m k hf x h y k k k k hf x h y k k k hf x h y k k hf x y y y k k k               