Question: A student attempted to confirm that the function f defined by f (x) _ 2-5x+4 x2 -6x+8 is continuous at x = 4. In which

A student attempted to confirm that the function f defined by

A student attempted to confirm that the function f defined by f (x) _ 2-5x+4 x2 -6x+8 is continuous at x = 4. In which step, if any, does an error first appear? Step 1: f (a) = x2-5x+4 (x-4) (x-1) x2 -6x+8 (x-4) (x-2) Step 2: lim f (ac) = lim -1 2-+4 2 -2 Step 3: f (4) = 1-2 . = 7 Step 4: lim f (x) = f (4), so f is continuous at x = 4. x-4 A Step 2 B Step 3 C Step 4 D There is no error in the confirmation

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