5. a) 63 va 117 ning EKUBini toping. b) a) bandda topilgan EKUBning kvadrat ildizini toping.

\(63=3^2\cdot7\), \(117=3^2\cdot13\).

Shuning uchun \(\operatorname{EKUB}(63,117)=3^2=9\).

\(\sqrt{9}=3\).

Javob: a) 9; b) 3.