Tìm x ϵ Z ,để A ϵ Z

a)A=\(\frac{-\sqrt{x}+6}{\sqrt{x}-2}\)

b)A=\(\frac{4\sqrt{x}+1}{2\sqrt{x}-1}\)

c)A=\(\frac{\sqrt{x}-2}{3\sqrt{x}-4}\)

d)A=\(\frac{3\sqrt{x}}{5\sqrt{x}-1}\)

1)Tìm GTNN của M

Cho M= \(^{\dfrac{x+4}{x-1}}\cdot\left(\dfrac{x^3}{2x+2}+1\right)-\dfrac{14x+11}{2x^2-2}\)