Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
Tim cac so a,b,c biet a2+b2+c2=ab+bc+ca va a2011+b2011+c2011=32012
cho a va b la 2 so tu nhien .Biet a chia cho 3 du 1 va b chia cho 3 du 2.Chung minh rang ab chia cho 3 du 2.
Cho a>=0,b>=0 thoa man 2a+3b<=6 va 2a+b<=4.Tim max va min cua bieu thuc A=a^2 -ab -b^2
Ban nao biet giup minh voi.TKS
tim gia tri nho nhat cua bieu thuc biet a+b=1 va A=a3+b3
cho 2 bieu thuc A=x+x^2/2-x va B=2x/x+1+3/x-2-2x^2+1/x^2-x-2 a, tinh gia tri cua A khi /2x-3/=1 b,tim dieu kien xac dinh va rut gon bieu thuc B c,tim so nguyen x de P=A.B dat gia tri lon nhat
mk dang can gap
tim cac chu so a,b,c doi 1 khac nhau biet 100a+10c+b+100c+10a+b=200a+20b+2c va b>c
tim 2 so thuc a va b de ax^3+x^2-x+b chia het cho x^2+3x+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 2 bieu thuc :
A=\(\dfrac{x-3}{x+2}va\) B= \(\dfrac{3}{x+3}+\dfrac{2}{x-3}-\dfrac{3x-9}{x^2-9}\left(x-2,x\ne3x\ne-3\right)\)
a, Tinh gia tri bieu thuc A khi x=5
b, Chung minh : B=\(\dfrac{2}{x-3}\)
c, Biet C = A.B, Tim x de c = \(\dfrac{-1}{3}\)
