Mathematics
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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 .
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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}
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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
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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
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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
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OpenStudy (jango_in_dtown):
So here the range and domain are the same
OpenStudy (shelbywyatt):
ahh right
OpenStudy (shelbywyatt):
thank you so much