SOLUTION: cardinality for the set A = {900, 901, 902, . . ., 9000} thanks

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Question 425870: cardinality for the set
A = {900, 901, 902, . . ., 9000}
thanks
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
The cardinality of A is equal to the number of elements in A. This is equal to 9000 - 900 + 1 = 8101 (note that we add 1 because the set is inclusive. You can also create a bijective relation by subtracting 899 from each member).