1) What is the slope of y=x/((x^2)-1) at the point x=7? 2) How do you differentiate the equation xy+3x+8x^2=5 explicitly for y and in terms of x?

1) What is the slope of y=x/((x^2)-1) at the point x=7?

2) How do you differentiate the equation xy+3x+8x^2=5 explicitly for y and in terms of x?

3) What are the critical numbers in the function f(x)=x^3+3x^2-24x ? If they exist?

Thank you!