Consider the following. x-1 f (x) = 12 + 6.x - 7 Find the x-values at which f is not continuous. Which of the discontinuities are removable? (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) X= ---Select--- X= ---Select--- : ......." -Select--- removable Submit Answer nonremovable N/A: no discontinuity