Các câu hỏi tương tự
Cho \(A=\frac{455}{1}+\frac{454}{2}+\frac{453}{3}+...+\frac{2}{454}+\frac{1}{455}.\) So sánh A với 2007
cho A=\(\frac{455}{1}+\frac{454}{2}+\frac{453}{3}+......+\frac{2}{454}+\frac{1}{455}\)
CMR:A>2053
CHO:A=\(\frac{455}{1}+\frac{454}{2}+\frac{453}{3}+...+\frac{1}{455}\)
chứng minh rằng :A>2007
\(\frac{34}{245}\) x \(\frac{323}{23}\)+ 467 = bao nhieu
\(\frac{323}{34}\) + \(\frac{34}{345}\) x 84 = bao nhieu
Cho A=\(\frac{455}{1}\) +\(\frac{454}{2}\) +\(\frac{453}{3}\) +......+\(\frac{2}{454}\)+\(\frac{1}{455}\) .So sánh A và 2007
tinh nhanh 133 x 437 + 453 = bao nhieu
A= \(0,4+\frac{2}{9}-\frac{2}{11}\)
B=\(1,6+\frac{8}{9}-\frac{8}{11}\)
hoi \(\frac{A}{B}\)bang bao nhieu
Tim x thuoc so tu nhien khac 0
a,\(\frac{x}{9}<\frac{7}{x}<\frac{x}{6}\)
b,\(\frac{5}{x}<\frac{x}{6}<\frac{-3}{x}\)
Cam on nhieu