Question

42. (3) ( x=27 )
( therefore sqrt[3]{x}+sqrt[3]{y}=sqrt[3]{729} )
( Rightarrow sqrt[3]{27}+sqrt[3]{y}=9 )
( Rightarrow 3+sqrt[3]{y}=9 )
( Rightarrow sqrt[3]{y}=9-3=6 )
( therefore y=(6)^{3}=216 )

# 42. If x = 27 and *x + y = 3729, then y = (1) 64 (2) 125 (3) 216 (4) 81

Solution