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Are the following pairs of sets equal? G...

Are the following pairs of sets equal? Give reason. `A={x : x` is a letter of the word WOLF`}` `B={x : x` is a letter of the word `"F O L L O W"}`

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`{A}={{x}: {x}` is a letter in the word `{F}OLLOW }`

`={{F}, {O}, {L}, {W}}`

`{B}={{y}: {y}` is a letter in the word `{WOLF}}={{W}, {O}, {L}, {F}}`

The order in which the elements of a set are listed is not significant. `therefore A=B`

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