A Nice Math Problem • Simplify Radical

#maths
Simplify Radical

[yassinenajar]

I got the same results but what i did was different, i used the definition of a square root so i wrote square root of the first seven as 7 to the power of 1/2, the second square root as 7 to the power of 1/4, and the last seven as seven to the power of 1/8, and you basically then you use the power's rule to add the exponents and i got 7/8.