Tính A=1*50+2*49+3*48+...+49*2+50*1
cho p=1/2+1/3+1/4+…+1/47+1/48+1/49+1/50
q=1/49+2/48+3/49+…47/3+48/2+49/1
tính p/q
tính các tổng sau
A=1*2+2*3+3*4+4*5+5*6+6*7...+49*50
B=1*50+2*49+3*48+...+49*2+50*1
Tính S/P biết:
S = 1/2 + 1/3 + 1/4 + 1/5 + ... + 1/49 + 1/50
P = 1/49 + 2/48 + 3/47 + ... + 48/2 +49/1
S=1/2+1/3+1/4+....+1/49+1/50,P=1/49+2/48+3/47+....+48/2+49/1,hay tim S/P
Cho
A=1/2+1/3+...+1/49+1/50
B=1/49+2/48+...+48/2+49/2
Cho S =1/2 +1/3 + 1/4+...+1/48+1/49+1/50
Và P = 1/49 + 2/48 + 3/47+...+ 48/2 + 49/1
Tính S / P
cho S = 1/2+1/3+1/4+...+1/49+1/50 và P = 1/49 +2/48+3/47+...+48/2+49/1.
tính S/P
Cho P = 1/2 + 1/3 + 1/4 + ... + 1/48 + 1/49 + 1/50 và Q = 1/49 +2/48 +3/47 + ... + 48/2 + 49/1.
Hãy tính P/Q