57
RCMultiple Choice
Trigonometric Sum Identities — Cumulative exam
Question 57 • Precalculus
Determine if the given function has any points of discontinuity. Explain your reasoning.
Answer
A
There is a point of discontinuity at x = b because the denominator has the factor x – b.B
There are points of discontinuity at both x = – b and x = b because the numerator has factors of x + b and x – b.C
There is a point of discontinuity at x = -b only because the factor of x – b is common to both the numerator and denominator.D
There is a point of discontinuity at x = b only because the factor of x – b is common to both the numerator and denominator and factors out.