Write the power set of {+, −, ×, ÷}
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Ritiksuglan:
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let
A = {+ , -, x, -:-}
p(A) = {Φ} ,{+} ,{-}, {x} ,{-:-}, { +,-},{+,x},{+,-:-},{-,x},{-, -:- } ,{ x, -:-} ,{+,-,x}{-,x, -:-}
{x, -:-,+}{ -:-,+,-}....
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