Các câu hỏi tương tự
cmr : a^2/b^2 +b^2/c^2+c^2/a^2 luon luon lon hon hoac bang c/b+ b/a+ a/c voi a,b,c lon hon 0
chung minh P=x^4 - 2x^3 + 2x^2 - 2x + 1 lon hon hoac = 0 voi moi gia tri cua x
cho a,b,c lon hon hoac bang 1.Tim gtln cua P = (a+1)(b+1)(c+1)/abc+1
cho x,y>0 thoa man x lon hon hoac bang 2y.TTim min M=x^2+y^2/xy
giai bat phuong trinh thuong x mu hai cong 1 chia 3 tru x lon hon hoac bang khong
c/m voi 3 so thuc tuy y ta co
a2 cong b2 cong 1 lon hon hoac bang ab cong a cong b
c/m rang
A=1/32+1/52+1/72+...+1/n2, voi n le , n lon hon hoac bang 3
toan 8 hai nao ae giup minh voi
Cho a1 , a2, a3 ... , a9 duoc xd boi cong thuc:
ak= 3k^2+3k+1/(k^2+k)^3 voi moi k lon hon hoac bang 1
tong 1+a1+a2+....+a9 co gia tri
tim Mim A= a^3+b^3+c^3 biet : a,b,c lon hon hoac bang 1va a+b+c= 0