简便运算ppt1x2+2x4+3x9.100x200_____________________________2x3+4x6+6x9.200x300
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简便运算ppt1x2+2x4+3x9.100x200_____________________________2x3+4x6+6x9.200x300简便运算ppt1x2+2x4+3x9.100x200
简便运算ppt1x2+2x4+3x9.100x200_____________________________2x3+4x6+6x9.200x300
简便运算ppt
1x2+2x4+3x9.100x200
_____________________________
2x3+4x6+6x9.200x300
简便运算ppt1x2+2x4+3x9.100x200_____________________________2x3+4x6+6x9.200x300
= (1x2) / (2x3)
= 1/3
原式=6x(1+2^2+~~~+100^2)
=6x1/6x100x(100+1)x(2x100+1)
=2030100
简便运算ppt1x2+2x4+3x9.100x200_____________________________2x3+4x6+6x9.200x300
(1x2+2x4+3x6+4x8)/(2x3+4x6+6x9+8x12)简便方法啊,
1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+8x12简便方法啊(1x2+2x4+3x6+4x8 )/( 2x3+4x6+6x9+8x12)
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