3.5 < x > 4.5
15< x > 20
=> x\(\in\){21;22;23;.....}
Vậy x \(\in\){21;22;23;.....}
3.5 < x > 4.5
15< x > 20
=> x∈{21;22;23;.....}
Vậy x ∈{21;22;23;.....}
3.5 < x > 4.5
15< x > 20
=> x\(\in\){21;22;23;.....}
Vậy x \(\in\){21;22;23;.....}
3.5 < x > 4.5
15< x > 20
=> x∈{21;22;23;.....}
Vậy x ∈{21;22;23;.....}
tim x :
( x + 12.8 ) + ( x + 13.6 ) + ( x + 14.4 ) + ( x - 12.1 ) + ( x - 12.9 ) + ( x - 11.3 ) = 4.5
tim mot so bot di 2.1,roi them 4.5 bang 29. tim so do
1 so bot di 2.1 roi them 4.5 bang 29. hay tim so do?
ot so bot di 2,1 roi them 4.5 thi bang 29.hay tim so do
tính bằng cách thuận tiện 12.3 x 4.5 + 4.5 x 7.7
x*4+4.5=x:4-4.5.Vậy x bằng bao nhiêu
trung binh cong cua 3 so la 4.5 trung binh cong cua so thu nhat va so thu hai la 4.15 trung binh cong cua so thu hai va so thu ba la 4.9 tim so thu nhat
Trung binh cong cua ba so la 4.5 trung binh cong cua so thu nhat va so thu hai la 4.15 trung binh cong cua so thu hai va so thu ba la 4.9 tim so thu nhat
4.5 x 2.4 + X=19.9