I need help quick plz! How do you solve this? I have the answer key from my teacher which he provided but I’m very confused on how to solve it. I’m stuck on the conjugating part. The answer is 1/6. However, I need the steps to get that.

Multiply the numerator and denominator by . The motivation for this is to exploit the difference of squares identity,

In this case, and . So we have

Now the expression in the limit is continuous at , so the limit can be computed by substitution:

the answer to the question is punishment. or more specifically, positive punishment.

positive punishment occurs when a behavior is given a negative consequence for the individual doing the behavior.

sara no longer wants to ask questions (the behavior) because she is ridiculed by mr. smith (the punishment).

reinforcement is inaccurate because reinforcement always gives positive consequences for the individual doing the behavior, be it by introducing a pleasant consequence or removing an unpleasant one.