3
QuizMultiple Choice
Finding Limits
Question 3 • Precalculus
Which function has a removable discontinuity at x = 7?
Answer
A
f (x) = StartFraction 3 Over x minus 7 EndFraction
B
f (x) = StartFraction x squared minus 10 x + 21 Over x minus 7 EndFraction
C
f (x) = StartLayout Enlarged left-brace first row negative x, x less-than 7 second row x + 1, x greater-than-or-equal-to 7 EndLayout
D
f (x) = StartLayout Enlarged left-brace first row negative StartFraction x Over x minus 7 EndFraction, x less-than 7 second row x + 1, x greater-than-or-equal-to 7 EndLayout