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ECO 435 – Review of Integral Calculus

ECO 435 – Review of Integral Calculus. David Loomis. Basic definition. is defined informally to be the signed area of the region in the xy -plane bounded by the graph of ƒ , the x -axis, and the vertical lines x = a and x = b . Graph. Fundamental Theorem of Calculus.

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ECO 435 – Review of Integral Calculus

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  1. ECO 435 – Review of Integral Calculus David Loomis

  2. Basic definition is defined informally to be the signed area of the region in the xy-plane bounded by the graph of ƒ, the x-axis, and the vertical lines x = a and x = b.

  3. Graph

  4. Fundamental Theorem of Calculus Where F is the antiderivative of f

  5. Upper and lower bounds. An integrable function f on [a, b], is necessarily bounded on that interval. Thus there are real numbersm and M so that m ≤ f (x) ≤ M for all x in [a, b]. Since the lower and upper sums of f over [a, b] are therefore bounded by, respectively, m(b − a) and M(b − a), it follows that

  6. Inequalities between functions • If f(x) ≤ g(x) for each x in [a, b] then each of the upper and lower sums of f is bounded above by the upper and lower sums, respectively, of g. Thus

  7. Subintervals • If [c, d] is a subinterval of [a, b] and f(x) is non-negative for all x, then

  8. Reversing limits of integration. • If a > b then define

  9. Integrals over intervals of length zero. • If a is a real number then

  10. Additivity of integration on intervals • If c is any element of [a, b], then

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