Question

find the value of (1^3 + 2^3 +3^2 ) ^-3/2

Answer 1

(1^3 + 2^3 +3^2 ) ^-3/2
= (1+8+9)^ -3/2
= (18)^ -3/2
= 1/18^3/2
= 1/18√18
= 1/54√2
= √2/108.