(100-1) x (100-2) x ... x (100-99) x(100-100)
(1-99/99)x(1-100/100)x.......x(1-2010/2010)=?
(1-99/99)x(1-100/100)x.......x(1-2010/2010)=?
tinh nhanh
[ 0 x 1 x 2 x 3 ...x 99 x 100] : [2 + 4 + 6 + ... 98]
[1+ 3 + 5 + 7 + ... 97 + 99 ] x [ 45 x 3 - 45 x 2 - 45]
132 x 145 + 100 /145 x 133 - 45
(100-1)x(100-2)x....x(100-90)x(100-100)
Trả lời và giải thích
(x+1)+(x-2)+(x+3)+...+(x+99)+(x-100)=50
100 x 1 = ?
100 x 2 = ?
100 x 3 = ?
100 x 4 = ?
100 x 5 = ?
Tính S- 1/2 x 2/3 x 3/4 x ...x 99/100
1 x 2 + 2 x 3 + 3 x 4 + ............... + 99 x 100