8 x8 - 8x1 =
1/8x1/10:1/8=1/8x1/10x...=....?
x:1/4=8
x=8x1/4
x=2 hay là 1/32 vậy?
1x8+...=9 1...x8+...=...8 1...x8+...=...7 1...x8+...=...6 1...x8+...=...5 1...x8+...=...4 1...x8+...=...3 1...x8+...=...2 1...x8+...=...1
điền vào tất cả ....
1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6+1/6x1/7+1/7x1/8+1/8x1/9
1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6+1/6x1/7+1/7x1/8+1/8x1/9
=7/18
tìm x
(x8+9)-(x8-8)=17
8 x 8 x8 x 8 x 8 : 64
8 x 8 x 8 x 8 x 8 :64
= 40 : 64 = 0,625
k mik nha
1x2x3x...x9 - 1x2x3x...x8 - 1x2x3x...x8 x 8
Giải nhanh mình tick!
Ta có 1x2x3x...x9-1x2x3x...x8=1x2x3x...x8x8
Mà 1x2x3x...x8x8-1x2x3x...x8x8=0
Suy ra 1x2x3x...x9-1x2x3x...x8-1x2x3x...x8x8=0
8x2x1/8x1/4x1/2x4
=(1/8x8)x(4x1/4)x(2x1/2)
=1x1x1
=1
cho mh nhé thanks nhiều?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
mk tính ở máy tính kết quả bằng 1 mà sao lại 00.25
46;78+971:89+(23:8)x8