Chỉ cần tính 1/2-1/3-1/6=6/12-4/12-2/+2=0/12=0
Suy ra (1/99+12/999+123/9999).(1/2-1/3-1/6)=(1/99+12/999+123/9999).0=0
Vậy kết quả là 0.
mk nha
(1/99+12/999-123/9999).(1/2-1/3-1/6)
(1/99+12/999-123/9999).(1/2-1/3-1/6)
Q=(1/99+12/999-123/9999).(1/2-1/3-1/6)
( 1/99 + 12/999 - 123/9999) x (1/2 - 1/3 - 1/6)
13-(1/99+12/999-123/9999).(1/2-1/3-1/6)
làm chi tiết
a) 8/5 x 2/5 x 3/8 x 10 x 19/192
b) ( 1/99 + 12/999 - 123/9999) x (1/2 - 1/3 - 1/6)
A=(1/99+12/999-123/9999)nhân(1/2-1/3-1/4) . hộ mk vs
A=(1/99+12/999-123/9999) x (1/2-1/3-1/4). hộ mk vs
1.Tính nhanh
A =( \(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\)) x \(\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6}\right)\)
2.Tìm n ∈ Z để \(\dfrac{n+3}{n-2}\)nhận giá trị nguyên
