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Q. 9
Expert-verifiedDiscuss the similarities and differences between the definition of the definite integral found in Chapter 4 and the definition of the double integral found in this section.
Ans: Riemann sum is the basic requirement for evaluating the integral.
definite integral and double integral.
For a definite integral, equal to the limit of Riemann sum of a function of a single variable over a closed interval (say [a, b]) as the number of subintervals goes to .
Whereas, for a double integral, equal to the limit of a double Riemann sum of a function of two variables over a rectangular region defined in two directions x and y (say that has been subdivided into smaller subrectangles in both the x and y directions as the numbers of subintervals in those two directions goes to .
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