算式999999999x999999999/(1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1)匀称,整齐,和谐,平衡给人以美的感受算式999999999*999999999/(1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1)匀称,整齐,和谐,平衡给人以美的感受,它还有一个优美的答案,

Question

算式999999999x999999999/(1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1)匀称,整齐,和谐,平衡给人以美的感受
算式999999999*999999999/(1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1)匀称,整齐,和谐,平衡给人以美的感受,它还有一个优美的答案,你能算出来吗?

Answer 1

分母
=1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1
=0+1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1
=(0+9)+(1+8)+(2+7)+(3+6)+(4+5)+(5+4)+(6+3)+(7+2)+(8+1)
=9×9
原式
=999999999*999999999/(9×9)
=111111111*111111111
=12345678987654321
确实很完美.