7. Determine the intervals on which the function f(x)=(x2-4 has an inverse. Make each interval as large as possible. 8. The function f(x)=+2 is not 1-1 on its implied domain, but it is 1-1 on the intervals (-0,0) and (0,-). (a) Restrict the domain offto the interval(-0) and find its inverse. (b) Restrict the domain off to the interval (0,-) and find its inverse. 9. Let f(x)=x-4x forx 52. Find the inverse function and graph both fandf'. Hint: complete the square. 10. Given f(x)=x-4x+1, find the slope of the line tangent to the graph of f' at the point (16,3)