tinh Q=(23/99-25/999-27/9999)(7/2-7/3-7/6)
Tim 3 chu so dau tien cua tong sau
1^2 + 2^3 + 3^4 + ... + 9999^10000
Chứng tỏ
a, 1/2-1/4+1/8-1/16+1/32-1/64<1/3
b, 1/3-2/3^2+3/3^3-4/3^4+...+99/3^99-100/3^100<3/16
c, 1/2.3/4.5/6...9999/10000<1/100
Thực hiện phép tính rồi rút gọn
A= 3/4. 8/9. 15/16... 9999/10000
B= [ 3 - 1/5+3/10] : ( 2+ 1/4 -3/5)
bài 1. tính
a, (1-1/4).(1-1/9)...(1-1/10000)
b, 3/4.8/9...9999/10000
c, 3-1/5+3/10/2+1/4-3/5
d, 2/3+2/5+2/17-2/293/3/7+3/5+3/17-3/293
1+2+3+4+5+........+9999+10000=?
Tính hợp lí:
2/5×8+2/8×11+....+2/95×98+2/98×1011/3×1/15×1/35×...×1/99992^2/1×3×3^2/2×4×4^2/3×5×...×99^2/98×1001/2+3/4+5/6+.....+9999/10000
