CLASS-11
SETS OF NUMBERS

Sets Of Numbers –

You are familiar with the following infinite sets of numbers.

1) Set N of natural numbers, i.e., N = {1, 2, 3,……………}

2) Set W of whole numbers, i.e., W = {0, 1, 2, 3, ………….}

3) Set Z of integers, i.e., Z = {………….., -3, -2, -1, 0, 1, 2, 3,………………..}

Sets-1

5) The set of irrational numbers, such as √3 and π, which cannot be expressed as a quotient of two integers, and their decimal forms do not terminate or repeat. However, we can approximate these numbers using terminating decimals, e.g., √2 = 1.414, π = 3.14, √3 = 1.732

                             -7√5, π, e, √8, √3/2

6) The set of real numbers R includes all the above sets of numbers.

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