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Suppose that f(t)=t^2+1-5 ​(a) What is the average rate of change of f(t) over the interval...

Suppose that f(t)=t^2+1-5

​(a) What is the average rate of change of f(t) over the interval 5 to 6​? ​

(b) What is the​ (instantaneous) rate of change of f(t) when t=5​?

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