Các câu hỏi tương tự
chứng minh :
A = 1+3+4+5+6+7+8+9+....+999999 chia hết cho 96
B = 8*8*8*8*8*8*....*8*9 chia hết cho 72
C = 80+90+100+110+....+9000 chia hết cho 3
D =(72+89)*(72+90)*(72+91)*.....*(72+300) chia hết cho 8
E = -2+-3+-4+-5+-6+-7+-8+-9+.......+-98 chia hết cho 0
1.2x15/72-(5/6+7/9):3/2/9-11/12 = ?
5.415.99-4.320.89 / 5.29.619-7229.276
tìm x
( 5x - 1 )^6 =72^9
3/2-5/6+7/12-9/20+....-17/72+19/90
5.415.99-4.320.89 / 5.29.619-7229.276
. la nhan
/ la phan so
1-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/91
m=3/2-5/6+7/12-9/20+11/30-13/42+15/56-17/72
Tính:
1. (-6 - 2).(-6 + 2)
2. (7.3-3) : (-6)
3. (-5+9).(-4)
4. 72:(-6.2+4)