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Mathematics 11 Online
OpenStudy (shelbywyatt):

y=2/x , Find the range of the function given that the domain of the function is all real numbers x, except x ≠ 0 .

OpenStudy (shelbywyatt):

i think its y>0

OpenStudy (jango_in_dtown):

\[f(x)=y=2/x, x \neq 0\]

OpenStudy (jango_in_dtown):

range means the possible y values corresponding to x

OpenStudy (jango_in_dtown):

{2/x, x not eqaul to 0} so it will be R\{0}, where R is the set of all real numbers

OpenStudy (shelbywyatt):

what does R/{0}

OpenStudy (shelbywyatt):

mean

OpenStudy (jango_in_dtown):

all real numbers except 0

OpenStudy (shelbywyatt):

so if y is all real numbers except 0 x would be all real numbers except 0 to?

OpenStudy (jango_in_dtown):

yes... it is given in the question

OpenStudy (shelbywyatt):

ok so the answer is 2/{0} right , sry for not getting it

OpenStudy (jango_in_dtown):

Wait... let me explain you properly

OpenStudy (shelbywyatt):

ok

OpenStudy (jango_in_dtown):

see the set of all x values is the domain.

OpenStudy (jango_in_dtown):

and the set of all y values is the range

OpenStudy (jango_in_dtown):

Here y=2/x and x is not 0. So obviously y cannot be zero because 2 and x are both non-zero

OpenStudy (shelbywyatt):

ok so the range (the answer) is any real number not 0, am i right?

OpenStudy (jango_in_dtown):

correct

OpenStudy (jango_in_dtown):

since x is real, 2/x is also real

OpenStudy (shelbywyatt):

okay thank you

OpenStudy (jango_in_dtown):

and will obviously contain all the values except 0

OpenStudy (jango_in_dtown):

So here the range and domain are the same

OpenStudy (shelbywyatt):

ahh right

OpenStudy (shelbywyatt):

thank you so much

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