Xét chiều biến thiên của hàm số y=x+4/x

which  best  describes the transformation from the graph of  f(x) =  x2  to the graph of  f(x) = (x  – 3)2  – 1?   left 3 units, down 1 unitleft 3 units, up 1 unitright 3 units, down 1 unit  right 3 units, up 1 unit

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8