so sanh
\(\frac{1+5+5^2+......+5^9}{1+5+5^2+......+5^8}\) va \(\frac{1+3+3^2+......+3^9}{1+3+3^2+......+3^8}\)
So sánh A và B
a) A = 224 ; B = 316.
b) A = ( 0,1 )15 ; B = ( 0,3 )30.
c) A = \(\left(\frac{-1}{4}\right)^8\) ; B = \(\left(\frac{1}{8}\right)^5\).
d) A = 1027 ; B = 913.
e) A = \(\frac{8^{18}+1}{8^{19}+1}\); B = \(\frac{8^{23}+1}{8^{24}+1}\).
f) A = \(\frac{5^5}{5+5^2+5^3+5^4}\); B = \(\frac{3^5}{3+3^2+3^3+3^4}\).
Ai làm nhanh và đúng nhất mik sẽ tik cho 3 cái 3 hôm >_<
so sanh
a)\(A=\frac{5}{4}+\frac{5}{4^2}+\frac{5}{4^3}+.....+\frac{5}{4^{99}}vaB=\frac{5}{3}\)
b)\(B=\frac{4}{3}+\frac{10}{9}+\frac{28}{27}+.....+\frac{3^{98}+1}{3^{98}}vaA=100\)
viet cac so huu ti sau duoi dang cac phan socung mau duong
a,\(\frac{4}{̣̣̣̣̣̣9}va\frac{3}{7}\)
b \(\frac{-2}{3}va\frac{-4}{5}\)
c\(\frac{1}{-5}\)va 1
Hay so sanh A=\(\frac{3^{2003+5}}{3^{2001}+5}\)va B=\(\frac{3^{2001+1}}{3^{1999+1}}\)
hay so sanh A=\(\frac{3^{2003}+5}{3^{2001+5}}\)va B=\(\frac{3^{2001}+1}{3^{1999}+1}\)
Bài 1 : So sánh A với B
a, \(A=\frac{8^{18}+1}{8^{19}+1}\)\(B=\frac{8^{23}+1}{8^{24}+1}\)
b, \(A=\frac{5^5}{5+5^2+5^3+5^4}\)
\(B=\frac{3^5}{3+3^2+3^3+3^4}\)
Tìm A:B, biết:
A=\(\frac{9}{1}+\frac{8}{2}+\frac{7}{3}+\frac{6}{4}+\frac{5}{5}+\frac{4}{6}+\frac{3}{7}+\frac{2}{8}+\frac{1}{9}\)
B=\(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{9}+\frac{1}{10}\)
so sanh cac so huu ti sau:
a.x=-3/5 va y=2/-3
b.x=35/84 va y=8/15
c.x=-5/4 va y=-3/8
d.x=-3/100 va y=2/3
e.x=8/9 va y=19/18
f.x=1250/1251 va y=25/24