(2分之3+3)X(3分之4+4)x(4分之5+5)x(5分之6+6)x(6分之7+7)
问题描述:
(2分之3+3)X(3分之4+4)x(4分之5+5)x(5分之6+6)x(6分之7+7)
答
(2分之3+3)X(3分之4+4)x(4分之5+5)x(5分之6+6)x(6分之7+7)
=3x4x5x6x7x(2分之1+1)X(3分之1+1)x(4分之1+1)x(5分之1+1)x(6分之1+1)
=3x4x5x6x7x(2分之3)X(3分之4)x(4分之5)x(5分之6)x(6分之7)
=3x4x5x6x7x(2分之7)
=8820
答
8820
答
(3/2+3)X(4/3+4)x(5/4+5)x(6/5+6)x(7/6+7)
=9/2X16/3X25/4X36/5X49/6
=9X4X5X49
=8820