Question

If y^8 = 4 and y^7 = 3/x, what is the value of y in terms of x?
(A) 4x/3
(B) 3x/4
(C) 4/x
(D) x/4
(E) 12/x

Answer 1

y^8 = 4
y^7 = 3/x

y(y^7) = 3/x(y)
y^8 = 3y/x

3y/x = 4
3y = 4x
y = 4x/3

Answer: (A)