\(\frac{101}{2}\times\frac{102}{2}\times\frac{103}{2}\times...\times\frac{200}{2}\)
\(=\frac{1.2.3.....100.101.102.103.....200}{1.2.3.....100.2^{100}}\)
\(=\frac{\left(1.3.5.....199\right).\left(2.4.6.....200\right)}{\left(1.2\right).\left(2.2\right).\left(3.2\right).....\left(100.2\right)}\)
\(=1.3.5.....199\)
Chứng tỏ 1.3.5.7.9....197.199=101/2.102/2.103/2....200/2
Chứng tỏ :1.3.5.7.9....197.199=101/2.102/2.103/2.....200/2
chứng minh rằng : 1.3.5.7....197.199 = \(\frac{101}{2}.\frac{102}{2}.\frac{103}{2}....\frac{200}{2}\)
Chứng tỏ rằng: 1.3.5.7.9. ... .197.199 = 101/2 . 102/2 . 103/2 . ... . 200/2
Giúp mình nhé các bạn!
Chứng tỏ rằng :1.5.7...197.199=\(\frac{101}{2}.\frac{102}{2}.\frac{103}{2}...\frac{200}{2}\)
CMR: 1.3.5.7......197.199=\(\frac{101}{2}+\frac{102}{2}+\frac{103}{2}+........+\frac{200}{2}\)
Chứng minh rằng:
1.3.5.7.9.....197.199=\(\frac{101}{2}+\frac{102}{2}+\frac{103}{2}+...+\frac{200}{2}\)
Chứng tỏ rằng 1/101+1/102+1/103+...+1/200>1/2
Chứng tỏ rằng: 1/101+1/102+1/103+......+1/200 > 1/2
