(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6x)(1x2x3x4x5x6+6x7x8x9x10x11) / (1x2x3x4x5x6)
问题描述:
(2x4x6x8x10+1x3x5x7x9)/(1x2x3x4x5)
(10x9x8x7x6-5x4x3x2x1) / ( 3x4x5x6x)
(1x2x3x4x5x6+6x7x8x9x10x11) / (1x2x3x4x5x6)
答