giai giup m nhanh vs ak
chung minh dang thuc duoi luon dung
\(\sqrt{a+4\sqrt{a-2}+2}+\sqrt{a-4\sqrt{a-2}+2}=4\)
chung minh bat dang thuc x^4 + 5 > x^2 + 4x
Mot cua hang thuc hien chinh sach giam gia nhu sau , giam 10% / ao ,20%/ quan , 30%/ giay , biet khi mua bao gom 1 ao , 1 quan , 1 giay thi giam them 5% , ban A mua 3 cai ao gia 300000/ cai , 2 cai quan 250000/cai , 1 doi giay 1000000/doi ( gia chua giam ). Hoi ban tra bao nhieu tien ?
AI BIET GIAI NHANH GIUP MINH NHE , MINH DANG CAN GAP LAM ! CAM ON NHIEU
1phầnx +1 phầny >=4phần x+y. Dau trong bat dang thuc xay ra khi nao
chung minh bat dang thuc 2(a^4+1) + (b^2 +1)^2>=2(ab+1)^2
cho x,y,z thoa man dang thuc 3x^2+16y^2+12x-8xz+18=0 tinh gia tri cua x+y
tim stn n nho nhat de co bat dang thuc (a^2+b^2+c^2)^2=n(a^4+b^4+c^4)
Cho tam giac ABC bat ky , chung minh bat dang thuc 1/(BC+CA)^2 + 1/(BC+AB)^2 >= 1/(BC^2+CA.AB)
phan tich da thuc thanh phan tu x^8+3x^4+1
Chung minh cac dang thuc sau\(\left(\frac{2\sqrt{3}-\sqrt{6}}{\sqrt{8}-2}-\frac{\sqrt{216}}{3}\right).\frac{1}{\sqrt{6}}=-1,5\)