1X+2X+3X…+98X+99X+100X=50500X X等于多少?
问题描述:
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
答
X=0
1X+2X+3X…+98X+99X+100X=5050X,又=50500X,消去X,5050=50500不成立,只有一种情况就是X=0
答
1X+2X+3X…+98X+99X+100X=5050x=50500
x=10