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anonymous
 one year ago
For what value of x is the rational expression below defined?
2(x)+4/x7 ?
7
2
7
2
anonymous
 one year ago
For what value of x is the rational expression below defined? 2(x)+4/x7 ? 7 2 7 2

This Question is Closed

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2defined? or not defined ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2because there is only one value where that fraction is undefined and it will be defined for all other values of x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0undefined. sorry AGAIN!! haha XD

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2so it'll be undefined when the denominator equals 0 ! :)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2when is x7 =0 ?? for what value of x ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2excellent! \(\huge \checkmark \)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but what does undefined mean and how does that make a role in the question

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2what is the value of say 1/0 ?? or can any number be divided by 0 ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2we haven't defined what we get as a result of 'division by 0'. hence in any expression, when we get a denominator as = 0 , we say its undefined.. in your question the denominator was x7

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Darn it I missed the question... as for undefined numbers.... the reason division by zero is undefined is because you can fit an arbitrary number of 0s into a number. Infinite if you like, and still not get close to it. So dividing by zero outputs a set... which is another kind of construct all together... :O
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