(x-140):35=3^2+4^2
(x-140):35=25
x-140=25x35=875
x=875+140=1015
(x-140):35=3^2+4^2
(x-140):35=25
x-140=25x35=875
x=875+140=1015
S=1/2mu2 + 1/3mu2 + 1/4mu2 + ... + 1/100mu2 bé hơn 1
chung minh rang : 1 +1/2mu2 +1/3mu2 +1/4mu2 +...+1/100mu2 < 2
chung minh rang;
1/2mu2+1/3mu2+1/4mu2+...+1/2005mu2<1/2
11/2mu2+1/3mu2+1/4mu2+...+1/9mu2 cmr 2/5<s<8/9
(1-1/2mu2)(1-1/3mu2)(1-1/4mu2)......(1-1/10mu2)????
Giúp mình với
chứng tỏ rằng:1/2mu2+1/3mu2+1/4mu2+....+1/2014mu2+1/2015mu2<1
lề:mjh k pjt vjet dau fan so va dau mu nen vjet vay nhe
p/s:cac ban gjaj gjup mjh vs,aj co nhu cau ket ban vs mjh k nk
86:[2.(2.x-1)mu2-7]+4mu2= 2.3mu2
Giúp mk nhoa
4.5mu2-3mu2.(2018 mu0+3mu2)
giup minh voi minh can gap
tinh cac tong sau
A= 4/ 3*7+4/7*11+4/11*15 +...+4/107*111
B= 2/15 +2/35+2/63+...+2/399
C= 7/10*11+7/11*12+7/12*13+...+7/69*70
D= 6/15*18+6/18*21+6/21*24+...+6/87*90
E= 3 mu 2/ 8*11+ 3mu2/11*14+3mu2/14*17+...+3 mu2 / 197*200