Textbook Notes (368,826)
Canada (162,194)
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ECON 2500 (12)
Chapter

practice problems

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Department
Economics
Course
ECON 2500
Professor
John Paschakis
Semester
Winter

Description
Math Preparation  Summation operator A shorthand for manipulating expressing involving the sums of many numbers. If X in.., denotes a sequence of numbers, then we write the sum of these numbers i as n  X i nX1 2 X i1 Property sum 1: for any constant c(adding the constant for n times) n  cn i1 Property sum 2: for any constant c(taking the common factor out of the summation) n n cX  c X  i i i1i 1
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