Question

Determine all numbers at which the function is continuous

Answer 1

Answer

Please see attached image for full understanding of the solution

If we plot the function we can see that it has a discontinuity at x = 1.

Also,

If we evaluate at x = -9, we see that the values of the piecewise function in both cases are completely different.

Therefore, x = -9 is also a discontinuity.

The right answer is option a

(discontinuity at x = 1 and x = -9)