tìm các giá trị nguyên để biểu thức sau cũng có giá trị nguyên

a) \(\frac{-1}{2x+3}\)

b) \(\frac{x^3-x^2+2}{x-1}\)

c) \(\frac{x-2}{x^3-2x^2+4}\)

tìm GTNN

a)\(\frac{-3}{x^2+1}\)

b)\(\frac{x^2+3x-1}{x^2}\)

c)\(\frac{x^4+3x^2+3}{x^2+1}\)

tìm GTLN của biểu thức

a) \(\frac{3}{x^2+1}\)

b) \(\frac{3x^2+6x+8}{x^2+2x+2}\)

với những giá trị nào thì x của 2 phân thức kia bằng nhau

a\(\frac{x-2}{x^2-5x+6}\)và \(\frac{1}{x-3}\)

b) \(A=\frac{\left(2x+1\right)\left(x-2\right)}{3\left(2x+1\right)}\) và \(B=\frac{x-2}{3}vớix\in N\)

complete the story, using the verbs in the box

( laughed at - cought - ran - tied - couldn't )

A lion lay sleeping. A mouse (1)_____over him. He woke up and ( 2 )______her. The mouse begged him to let her go :

" If you let me go, I will do you good deed "

The lion(3)_____ the idea of the mouse doing him a good deed, and let her go gnawed through the ropes and siad

" Remember how do you langhed bcause yought I (5)________ do you good deed " She said

"Now you see that a mouse can do good too"