Question

help me with this second question plz

Answer 1

Answer:

b = 9

Step-by-step explanation:

b

[9(64^1/3 + 125^1/3)^3}^1/4

[9(4 + 5)^3]^1/4   [ 64^1/3 = (4^3)^1/3  ; 125^1/3 = (5^3)^1/3]

[9 x 9^3 ]^1/4

[9 x 729)^1/4

(6561)1/4

(9^4)1/4

=9