\(\frac{1.3.5+2.6.10+4.12.20}{1.5.7+2.10.14+4.20.28}\)
\(=\frac{3.5+2.3.2.5.2+4.3.4.5.4}{5.7+2.5.2.2.7+4.4.5.7.4}\)
\(=\frac{3.5.\left(1+2.2.2+4.4.4\right)}{5.7.\left(1+2.2.2+4.4.4\right)}\)
\(=\frac{3}{7}>\frac{3}{8}\)
Tính nhanh: A = \(\frac{1.5.6+2.10.12+3.15.18+4.20.24+5.25.30}{1.3.5+2.6.10+3.9.15+4.12.20+5.15.25}\)
Tính nhanh: A=\(\frac{1.5.6+2.10.12+3.15.18+4.20.24+5.25.30}{1.3.5+2.6.10+3.9.15+4.12.20+5.15.25}\) các bạn giải chi tiết giúp mình nhé!
Cho \(S=\frac{3}{2}+\frac{4}{3}+\frac{5}{4}+\frac{6}{5}+\frac{7}{6}+\frac{8}{7}+\frac{9}{8}+\frac{10}{9}+\frac{11}{10}+\frac{12}{11}\)
So sánh S với 10
Cho A = \(\frac{1}{2}.\frac{3}{4}.\frac{5}{6}.\frac{7}{8}.......\frac{447}{448}.\frac{449}{450}\)
So sánh A với \(\frac{1}{30}\)
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, \(A=\frac{5^5}{5+5^2+5^3+5^4}\)
\(B=\frac{3^5}{3+3^2+3^3+3^4}\)
So sánh hai phân số:
A=\(\frac{3}{8^3}\)+ \(\frac{7}{8^4}\) và B= \(\frac{7}{8^3}\)+ \(\frac{3}{8^4}\)
So sánh \(A=\frac{10^8+2}{10^8+1};B=\frac{10^8}{10^8-3}\)
So sánh \(S=\frac{1}{2}.\frac{3}{4}.\frac{5}{6}.\frac{7}{8}...\frac{9999}{10000}\)và \(\frac{1}{100}\)
So sánh \(S=\frac{1}{2}.\frac{3}{4}.\frac{5}{6}.\frac{7}{8}...\frac{9999}{10000}\)và \(\frac{1}{100}\)
