so sanh 2 mu 36 va 3 mu 27
9 mu 20 va 9999 mu 10
54 mu 4 va 21 mu 12
cho A= 2x mu 2-10xy+2016y mu 2+y va B=5x mu 2-7xy+2016y mu 2+7y-2016.tim C biet A+C=B
thu gon cac don thuc va chi ra phan he so cua chung 5x mu 2 nhan 3xy mu 2
tim cac tu nhien a va b sao cho 2 mu a + 2 mu b = 2 mu a+b
tim cac tu nhien a va b sao cho 2 mu a + 2 mu b = 2 mu a+b
chung minh 1-1/2 mu 2 -1/ 3 mu 2 - 1/ 4 mu 2 - ... - 1/2015 mu 2 > 1/2015
Chung minh rang:
b=2+2 mu 2+2 mu 3+....+2 mu 60
[1/2x mu 2(2x-1) mu m-1/2 x mu(m +2]:1/2x mu 2 =0
tim x
Cho A=1/2+(1/2) mu 2 +(1/2) mu 3 + (1/4) mu 4 +........(1/2) mu 98 +(1/2) mu 99
C/m A <1