Các câu hỏi tương tự
Chứng tỏ rằng
B=\(\frac{1}{2x2}+\frac{1}{3x3}+\frac{1}{4x4}+\frac{1}{5x5}+\frac{1}{6x6}+\frac{1}{7x7}+\frac{1}{8x8}< 1\)
CMR
\(\frac{1}{2x2}+\frac{1}{3x3}+\frac{1}{4x4}+...+\frac{1}{2017x2017}< \frac{3}{4}\)
Chứng minh:
\(\frac{1}{2x2}+\frac{1}{3x3}+\frac{1}{4x4}+.....+\frac{1}{10x10}\)\(< 1\)
CMR 1/2x2+1/4x4+1/6x6+........=1/100x100<1/2
CM rằng
\(\frac{1}{6}< \frac{1}{5x5}+\frac{1}{6x6}+\frac{1}{7x7}+............+\frac{1}{100x100}< \frac{1}{4}\)
1.so sanh a voi b biet
\(a=\frac{1x2}{2x2}x\frac{2x3}{3x3}x\frac{3x4}{4x4}x\frac{4x5}{5x5}x.....x\frac{2012x2013}{2013x2013}\)
\(b=\frac{2012x2013-2012x2012}{2012x2011+2012x2}\)
AI LÀM DUNG NHAT ,DAU TIEN MINH LIKE
\(A=1+\frac{2x2}{3x3}+\frac{2x2}{5x5}+\frac{2x2}{7x7}+...+\frac{2x2}{2009x2009}\)= ?
2x2+4x4+6x6+...+30x30
a) A (1-frac{1}{2})x( 1-frac{1}{3})x(1-frac{1}{4})x ..... x(1-frac{1}{2017})b) B 5frac{9}{10}:frac{3}{2}-(2frac{1}{3}x 4frac{1}{2}-2x2frac{1}{3}):frac{7}{4}
Đọc tiếp
a) A =(1-\(\frac{1}{2}\))x( 1-\(\frac{1}{3}\))x(1-\(\frac{1}{4}\))x ..... x(1-\(\frac{1}{2017}\))
b) B =5\(\frac{9}{10}\):\(\frac{3}{2}\)-(2\(\frac{1}{3}\)x 4\(\frac{1}{2}\)-2x2\(\frac{1}{3}\)):\(\frac{7}{4}\)