Các câu hỏi tương tự
tim gia tri nho nhat cua P=\(\frac{x+3\sqrt{x}+2}{x}\)
Tim gia tri lon nhat va gia tri nho nhat cua bieu thuc sau: A=\(\frac{x+1}{x^2+x+1}\)
Cho A \(\left(\frac{x-\sqrt{x}}{\sqrt{x}-1}+\frac{\sqrt{x}+1}{X+\sqrt{X}}\right):\frac{\sqrt{X}+1}{X}\)
a)Tìm dk cua x de A co nghia
b)Rut gon A
c)Tim gia tri nho nhat cua A
tim gia tri nho nhat cua \(\frac{3}{2+\sqrt{-x^2+2x+7}}\)
a\Rut gon bieu thuc
b/Tim gia tri nho nhat cua 4A
A=\(\frac{5\sqrt{x}+4}{x+\sqrt{x}-2}+\frac{\sqrt{x}-1}{\sqrt{x}+2}-\)\(\frac{\sqrt{x}+2}{\sqrt{x}-1}\)
cho m = \(\frac{-3}{\sqrt{x}+3}\) tim gia tri nho nhat cua m
Tim gia tri nho nhat cua \(y=\frac{x+3\sqrt{x-1}+1}{x+4\sqrt{x-1}+2}\) voi x\(\ge\) 1
gia tri nho nhat cua bieu thuc \(\sqrt{x-1}+\sqrt{2x^2-5x+7}\)
Cho x,y la cac so thuc duong. Tim gia tri nho nhat cua bieu thuc:
\(P=\frac{xy}{x^2+y^2}+\left(\frac{1}{x}+\frac{1}{y}\right)\sqrt{2\left(x^2+y^2\right)}\)