Question

How to solve please tell step by step

Answer 1

a will become cube root when a number is y*y*y for example 125 = 5*5*5
similarly a =7b² if we substitute b=1/49=1/(7*7)
a=7x1/(7*7*7*7)= 1/(7*7*7) which is a cube root
there fore the answer is b=1/49