\(Q=\frac{5}{30}+\frac{5}{30}+\frac{5}{30}+\frac{5}{30}+\frac{5}{30}\)
\(=\frac{5}{30}.5\)
\(=\frac{5}{6}\)
5/30+15/90+25/150+35/210+45/270
=1/6+1/6+1/6+1/6+1/6
=1/30
Q = 5 / 30 + 15 / 90 + 25 / 150 + 35 / 210 + 45 / 270
= 1 / 6 + 1 / 6 + 1 / 6 + 1 / 6 + 1 / 6
= 5 / 6
Tính bằng cách thuận tiện
Q=5/30+15/90+25/150+35/210+45/270= 5/6
nho k đúng cho mình nha