a) ta có \(\frac{1234}{1235}=1-\frac{1}{1235}\)
\(\frac{4319}{4320}=1-\frac{1}{4320}\)
vì \(\frac{1}{1235}>\frac{1}{4320}\Rightarrow1-\frac{1}{1235}< 1-\frac{1}{4320}\)
\(\Rightarrow\frac{1234}{1235}< \frac{4319}{4320}\)
b) ta có \(\frac{1234}{1244}=1-\frac{10}{1244}\)
\(\frac{4321}{4331}=1-\frac{10}{4331}\)
vì \(\frac{10}{1244}>\frac{10}{4331}\Rightarrow1-\frac{10}{1244}< 1-\frac{10}{4331}\)
\(\Rightarrow\frac{1234}{1244}< \frac{4321}{4331}\)
\(\Rightarrow\frac{-1234}{1244}>\frac{-4321}{4331}\)
A)
1- 1234/1235= 1/1235
1- 4319/4320= 1/4320
Vậy 1/1235 > 1/4320
1234/1235 > 4329/4320
Đ/s:...
Ko chắc, sai bỏ qa
a)
\(\frac{1234}{1235}=1-\frac{1}{1235}\)
\(\frac{4319}{4320}=1-\frac{1}{4320}\)
Ta có: 4320>1235 => \(\frac{1}{4320}< \frac{1}{1235}\Rightarrow1-\frac{1}{4320}>1-\frac{1}{1235}\Rightarrow\frac{4319}{4320}>\frac{1234}{1235}\)
b) Em tham khảo link Câu hỏi của Jenna - Toán lớp 7 - Học toán với OnlineMath
a)\(\frac{1234}{1235}=1-\frac{1}{1235}\)
\(\frac{4319}{4320}=1-\frac{1}{4320}\)
\(\frac{1}{1235}>\frac{1}{4320}\)nên \(\frac{1234}{1235}< \frac{4319}{4320}\)
b) Em chịu em mới lớp 5