For #52, use the 3 step continuity test to see if the equation is continuous at x = 1.

For #53, use the 3 step continuity test to see if the equation is continuous at x = 2.

\fMaking a Function Continuous In Exercises 61-66, find the constant a, or the constants a and b, such that the function is continuous on the entire real number line. 3x2 x21 61. f(x) = ax - 4, x