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Chapter 10.2, Problem 5E Step-by-step solution Step 1 of 1 5. When t = 0, the two functions have the same value same y ). Also, y1 = Aer when t = 1, but y2 = Aer when Generally, y1 = y2 whenever the value of t in one function is the negative of the t value in the other; hence the mirror- image relationship.