What is the domain of the function y = 2 StartRoot x minus 5 EndRoot?
x greater-than-or-equal-to negative 5
x greater-than-or-equal-to 2
x greater-than-or-equal-to 5
x greater-than-or-equal-to 10
@jhonyy9
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daynarussell:
[ y = 2\sqrt{x-5} \]
jhonyy9:
\[y = 2\sqrt{(x-5)}\]
daynarussell:
yes
jhonyy9:
ok how you ve learned the term inside radical how not can be ?
daynarussell:
no
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jhonyy9:
what no ?
daynarussell:
never mind
jhonyy9:
than you work in a real numbers domain
jhonyy9:
in R
jhonyy9:
when is defined the radical ?
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jhonyy9:
please Dayna - this you need learned it
daynarussell:
i have learned it but i forgot sorry
jhonyy9:
can you make radical from a negativ number in real numbers domain ?
jhonyy9:
\[\sqrt{(-1)} = ?\]
jhonyy9:
you ve learned about complex numbers ?
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jhonyy9:
in the form of ai +b
jhonyy9:
from where you know that i^2 = -1
jhonyy9:
riri any idea about this ?
jhonyy9:
ok Dayna remember for a radical being defined the term inside radical need being always greater then zero
ok ?
jhonyy9:
how you write this condition ?
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jhonyy9:
please collaborate
daynarussell:
got it thank you
jhonyy9:
can i check it please ?
jhonyy9:
then no so was my pleasure
have a nice day
bye bye