(1000 - 13)(1000 - 23)(1000 - 33)........(1000 - 503)
= (1000 - 13)(1000 - 23)(1000 - 33)....(1000 - 103)....(1000 - 503)
= (1000 - 13)(1000 - 23)(1000 - 33).....(1000 - 1000)...(1000 - 503)
= (1000 - 13)(1000 - 23)(1000 - 33).....0...(1000 - 503)
= 0
Tính nhanh:
a ) − 1 3 . − 1 5 . − 1 7 . − 1 9
b ) 1000 − 1 3 1000 − 2 3 1000 − 3 3 . ... 1000 − 60 3
c ) A = 1 1 .2 + 1 2 .3 + . ... + 1 99 .10
Tinh : (1000-1^3)*(1000-2^3)*(1000-3^3)....(1000-50^3)
tinh:(1000-1^3).(1000-2^3).(1000-3^3)...(1000-50^3)
Tinh
(1 + 1999/1)(1 + 1999/2)......(1 + 1999/1000)
( 1 + 1000/1)(1 + 1000/2)......(1 + 1000/1999)
Tinh nhanh
a,A=2018^(1*9*4*6)*(9*4*7)***(1*9*9*9)
b,B=(1000—1^3)*(1000—2^3)*(1000—3^3)***(1000—50^3)
tinh \(G=\frac{\left(1+\frac{2015}{1}\right)+\left(1+\frac{2015}{2}\right)+...+\left(1+\frac{2015}{1000}\right)}{\left(1+\frac{1000}{1}\right)\left(1+\frac{1000}{2}\right)+....+\left(1+\frac{1000}{2015}\right)}\)
( 1000 - 1^3 ) . ( 1000 - 2^3 ) . ( 1000 - 3^3 ) . ( 1000 - 4^3 ) ... ( 1000 - 50^3 ) = ?
A=1-1/2+1/3-1/4+...+1/999-1/1000 và B=500-500/501-501/502-502/503-...-999/1000
Câu hỏi tương tự Đọc thêm Báo cáo
Toán lớp 6 Phân số
10 + 10 - 10 . 10 : 10 + 20 - 20 : ......... - 100 . 100 :100 + .......... 1000 - 1000 . 1000 : 1000 = ?
