Question
Evaluate $\int_0^6 h'(x)\,dx$
Original question: 7. Evaluate .
Expert Verified Solution
Key concept: This problem uses the Fundamental Theorem of Calculus: the integral of a derivative over an interval equals the change in the original function over that interval.
Step by step
By the Fundamental Theorem of Calculus,
From the values given in the problem:
So,
Answer:
Pitfall alert
Do not try to integrate without using the endpoint values if the problem already gives and . For a derivative, the quickest route is usually the Fundamental Theorem of Calculus.
Try different conditions
If the limits were reversed, for example , the answer would be the negative of this result: . If the interval changed, you would use the new endpoint values in .
Further reading
Fundamental Theorem of Calculus, derivative integral, endpoint values
FAQ
Evaluate $\int_0^6 h'(x)\,dx$.
By the Fundamental Theorem of Calculus, $\int_0^6 h'(x)\,dx = h(6)-h(0) = 7-2 = 5$.
What theorem connects the integral of a derivative to function values?
The Fundamental Theorem of Calculus states that the definite integral of a derivative over an interval equals the change in the original function across the endpoints.