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when do we use the sign of union in finding domain.for example :-domain of 1/log(1-x) is (-infinity,0)U(0,1).and how will we get to know that union is to be used??

when do we use the sign of union in finding domain.for example :-domain of 1/log(1-x) is (-infinity,0)U(0,1).and how will we get to know that union is to be used??

Grade:11

3 Answers

Nicho priyatham
625 Points
5 years ago
we take union wn we get the word “OR”
EX:A or B means AUB
here the domain can be either (-infinti,0) OR(0,1) both of them stisify the above function as domain so we put U(union)
PLZ APPROVE if usefull n incase of any doubts PLZ put it in ans box 
 
Bidisha Baruah
20 Points
5 years ago
then what will be the  the domain of definition of f(x)=(x+3)6^1/2/{(2-x)(x-5)}^1/2.i want the detailed answer of this question.thank u 
Bidisha Baruah
20 Points
5 years ago
sorry its (x+3)^1/2

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