The temperature of a pond has been fluctuating abnormally over the past three days. A computer program has calculated the

Question

The temperature of a pond has been fluctuating abnormally over the past three days. A computer program has calculated the deviation from the normal temperature to follow the function Δ(t)=t²-1 in degrees Celsius per day. We want to calculate the total deviation from the norm over the past three days.

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