x=2,y=-4,
ax³+½by+5=8a-2b+5=1997
8a-2b=1992
4a-b=996
所以
x=-4,y=-½
3ax-24by³+5001
=-12a+3b+5001
=-3(4a-b)+5001
=-3×996+5001
=2013
x=2,y=-4,
ax³+½by+5=8a-2b+5=1997
8a-2b=1992
4a-b=996
所以
x=-4,y=-½
3ax-24by³+5001
=-12a+3b+5001
=-3(4a-b)+5001
=-3×996+5001
=2013