So sánh P và Q :
P=\(\frac{1.3.5.....39}{21.22.....40}\) Q=\(\frac{1}{2^{20}-1}\)
so sánh \(U=\frac{1.3.5.7...39}{21.22....40}\)và \(V=\frac{1}{2^{20}-1}\)
\(\frac{1.3.5...39}{21.22.23...40}=\frac{1}{2^{20}}\)
so sánh \(U=\frac{1.3.5.7....39}{21.22.23...40}\)và \(V=\frac{1}{2^{20}-1}\)
so sánh \(U=\frac{1.3.5.7....39}{21.22.23...40}\)và \(V=\frac{1}{2^{20}-1}\)
Chứng minh rằng:
a) \(\frac{1.3.5...39}{21.22.23...40}=\frac{1}{2^{20}}\)
b)\(\frac{1.3.5...\left(2n-1\right)}{\left(n+1\right)\left(n+2\right)...2n}=\frac{1}{2^n}\)
Chứng minh rằng:
a)\(\frac{1.3.5...39}{21.22.23...40}=\frac{1}{2^{20}}\)
b)\(\frac{1.3.5...\left(2n-1\right)}{\left(n+1\right)\left(n+2\right)\left(n+3\right)...2n}=\frac{1}{2^n}\)với n thuộc N*
Chứng minh rằng \(\frac{1.3.5...39}{21.22.23...40}=\frac{1}{2^{20}}\)
Chứng minh rằng: \(\frac{1.3.5...39}{21.22.23...40}=\frac{1}{2^{20}}\)