Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
Cho A = 1 + 1/2 = 1/3 + 1/4 + ... + 1/2^100 -1
CMR : a) A < 100
b) A > 50
cho A=1+1/2+1/3+1/4+....................+1/2^100-1 , cmr
a. A<100 , b.A>50
Cho a = 1+1/2+1/3+1/4+.....+1/(2100-1)
CMR P > 50
cho P = 1+1/2+1/3+.......+1/2100-1
CMR P > 50
CMR: A = \(1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2^{100}-1}>50\)
1. CMR:
A= 9/4 + 24/9 + ... + 29997/10000 > 294
B= 1/26 + 1/27 + ... + 1/50 = 1 - 1/2 + 1/3 - ... + 1/49 - 1/50
2. Tìm A/B, biết:
A= 1/2 - 3/4 + 5/6 - ... + 197/198 - 199/200
B= 1/51 + 1/52 + 1/53 + ... + 1/99 + 1/100
Cho B =1/7^2 - 1/7^4 +...+ 1/7^4n-2 - 1/7^4n + ...+ 1/7^98 - 1/7^100 CMR B < 1/50
CMR 100 - ( 1 + 1/2 + 1/3 + ... + 1/100 ) = 1/2 + 2/3 + ... + 99/100.
cmr 100-(1+1/2+1/3+...+1/100)=1/2+2/3+...+99/100
