9/10........9+3/10+3
so sanh 2 phan so
So sanh cac phan so sau:
A=\(\frac{3^{10}+1}{3^9+1}\)va B=\(\frac{3^9+1}{3^8+1}\)
bn vào /h7.net/hoi-dap/toan-6/so-sanh-a-3-10-1-3-9-1-va-b-3-9-1-3-8-1--faq205231.html
Trả lời:
A = \(\frac{3^{10}+1}{3^9+1}=\frac{3.3^9+1}{3.3^8+1}=\frac{3^9+1}{3^8+1}\)= B
_Học tốt bạn nha_
Hay neu 3 cach so sanh 2 phan so:2/7;4/9
so sanh A=9^10;B=8^9+7^9+.......+2^9+1^9
so sanh 3 phan 7 va 4 phan 9
ta có \(\frac{3}{7}=\frac{27}{63}\); \(\frac{4}{9}=\frac{28}{63}\)
vì \(\frac{27}{63}< \frac{28}{63}\)
nên\(\frac{3}{7}< \frac{4}{9}\)
so sanh hai hon so : 3 9/10 29/10
3 \(\frac{9}{10}\)> \(\frac{29}{10}\)
tk nhé
So sach hai phan so co cung tu so
2 phan 10 va 2 phan 7
8 phan 11 va 8 phan 9
10 phan 10 va 10 phan 7
A =9^9+1/9^10+1
B=10^9+1/10^10+1
so sanh a va b
A = 387420490 ; B = 1000000001
vậy B lớn hơn A
So sanh 3^10+1 / 3^9+1 va 3^9+1 / 3^8+1
so sanh
\(\frac{10^9}{10^9-3}\)
va
\(\frac{10^9+2}{10^9-1}\)
giai chi tiet dum minh nhoa
\(\frac{10^9}{10^9-3}>\frac{10^9+2}{10^9-1}\)