Cho tong: A= 1/32 - 1/34 + 1/36 - 1/38 + ... + 1/398 -1/3100
Hay so sanh A voi 0.1
A=1/1*2+1/2*3+1/3*4+......+1/99*100 so sanh voi 1
tinh tong:
S=(1+2.5+3.5+...+101+201)+12+22+32+...1002)
Cho A = 1/2+2/22+3/23+4/24+......+100/2100. So sanh A voi 2
Chứng minh 1/101+1/102+...+1/199+1/200>7/12
Cho M=1/3+2/32+3/33+...+99/399+100/3100. Chứng minh M<3/4
giúp nhanh hộ minh voi minh
cám ơn
A=1*2+2*3+...+100*101
B=1*3+2*4+...+100*102
Tính B-A= ????????
A=(1/22-1)(1/32-1)(1/42-1)...(1/1002-1)
so sanh A voi 1/2
Cho ham so
f(x)=4^x/4^x+2
Tinh A=f(0)+f(1/101)+f(2/101)+f(3/101)+...+f(100/101)+f(1)
Tính \(A=\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{102}}{\frac{101}{1}+\frac{100}{2}+\frac{99}{3}+...+\frac{1}{101}}\)