Các câu hỏi tương tự
cho a,b,c la cac so thoa man (a+1)^2+(b+2)^2+(c+3)2<2010.tim GTNN cua bieu thuc A=ab+b(c-1)+c(a-2)
cho hai so a,b thoa man a^2 + b^2=1.tim GTLN va GTNN cua bieu thuc A=a^6+b^6
Cho x,y,z la cac so thuc duong thoa man x + y + z = 6
Tim GTNN cua bieu thuc P = ( x + y )/(xyz)
cho cac so a, b, c thoa man: a(a-b)+b(b-c)+c(c-a)=0
tim gia tri nho nhat cua bieu thuc: A=a^3+b^3+c^3-3abc+3ab-3c+5
Cho 2 so thuc duong a,b thoa man a+b<=1.Tim GTNN cua
\(A=\frac{1}{a^3+b^3}+\frac{1}{a^2b}+\frac{1}{ab^2}\)
1.gia tri x thoa man x+(3x+1)2+1=9(x2+1)
2. rut gon bieu thucA=(a+b+c)2-(a-b-c)2-4b(a+c)+88
3.GTNN cua bieu thuc 4x2-4x-999+4x(1+x3)
4 cho hinh thang ABCDcoAB // CD , goc DAC=90 do , co duong cao AH , goc DAH =15 do . so do goc ACD la...
Cho cac so thuc a,b,c thoa man a^2 + b^2 + c^2 =3 va a + b + c+ ab + bc + ca = 6 Tinh gia tri cua bieu thuc A = (a^30 + b^4 + c^1975) / (a^30 + b^4 +c^2019)
cho cac so duong a,b,c thoa man (a^2+b^2+c^2)^2>2*(a^4+b^4+c^4)
cm rang a,b,c la do dai ba canh cua tam giac.
cho cac so thuc duong thoa man a+b+c=3.cmr:
(a2+ab2/b2+a+b)+(b2+bc2/c2+b+c)+(c2+ca2/a2+c+a) lon hon hoac bang 2