when multiplying roots, take the root of the product. You then have
7throot( (11x/y^6) * (y^6/11x^8) )
= 7throot(1/x^7)
= 1/x
It would help if you showed your work...
simplify the expression
(the 7th root of 11x/y^6)(the 7th root of y^6/11x^8)
the root is over the whole fraction in both cases.
I've already done the problem once and got x(the 7th root of 1/x). which apparently this is wrong.
2 answers
thanks next time i'll show my work. you've been a big help.