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Mathematics 8 Online
OpenStudy (anonymous):

that is so not what i wanted

OpenStudy (saifoo.khan):

o.O

OpenStudy (anonymous):

ok here goes

OpenStudy (anonymous):

\[\sqrt[8]{y^8} simplify\]

OpenStudy (saifoo.khan):

y^8/3

OpenStudy (anonymous):

huh?

OpenStudy (saifoo.khan):

y raise to the power 8 over 3

OpenStudy (anonymous):

where did u get 3?

OpenStudy (saifoo.khan):

is it 3rd root? or 8th root?

OpenStudy (anonymous):

i am so sorry. I dont know what you are talking about root.?

OpenStudy (saifoo.khan):

write your ques in words!

OpenStudy (saifoo.khan):

whts on the LEFT TOP?

OpenStudy (anonymous):

8

OpenStudy (saifoo.khan):

oh,

OpenStudy (saifoo.khan):

then your answer is: y

OpenStudy (anonymous):

so the square root of 8 is 1 = y?

OpenStudy (saifoo.khan):

its 8th root of 8

OpenStudy (saifoo.khan):

not squared coot. :p

OpenStudy (anonymous):

umm....

OpenStudy (anonymous):

how do you get y? say the numbers are changed to 6 and 12. how do i do that?

OpenStudy (saifoo.khan):

which numbers?

OpenStudy (anonymous):

\[\sqrt[6]{y ^ 12}\]

OpenStudy (anonymous):

y 12

OpenStudy (saifoo.khan):

can u join me @ twiddlA?

OpenStudy (saifoo.khan):

http://www.twiddla.com/577396

OpenStudy (anonymous):

yeah

jimthompson5910 (jim_thompson5910):

In general, \[\sqrt[n]{x^n}=|x|\] where n is an even number and is any real number. If we force x to be nonnegative, then \[\sqrt[n]{x^n}=x\] So if we assume that y is nonnegative, then \[\sqrt[8]{y^8}=y\] If y is any real number, then \[\sqrt[8]{y^8}=|y|\]

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