chứng minh rằng:1.3.5.....19=11/2.12/2.13/2.....20/2
chứng minh rằng :
1.3.5.....19=11/2.12/2....20/2
hứng minh rằng :
1.3.5....19=11/2.12/2.13/2....20/2
CMR:
1.3.5.7.....19=11/2.12/2.13/2.....20.2
chứng minh rằng:1.3.5.7.9=11/2.12/2.13/2....20/2
rút gọn
\(\frac{5^2.6^{11}.16^2+6^2.12^6.15^2}{2.6^{12}.10^4-81^2.960^3}\)
\(ChoA=\frac{5^2.6^{11}.16^2+6^2.12^6.15^2}{2.6^2.16^4-81^2-960^3}\)
\(C=\frac{5^2.6^{11}.16^2+6^2.12^6.15^2}{2.6^{12}.10^4-81^2.960^3}\)
CMR: 1.3.5....19 = 11/2 . 12/2 . 13/2 ... 20/2