if a and b are two integers and a=7b^2 then what is the condition that a is the cube - Maths - Real Numbers

Question

if a and b are two integers and a=7b^2 then what is the condition
that a is the cube root of 7

a) b=1/49 c) b=1/7

b) b=49 none of these

please help

Shruti Tyagi · Accepted Answer

Dear student,

We have,a=7b2when b=7then a=772⇒a=73⇒a3=7hence when b=7 the a is cube root of 7thus option d is correct

Regards

if a and b are two integers and a=7b^2. then what is the condition that a is the cube root of 7. a) b=1/49 c) b=1/7 b) b=49 none of these. please help