Is x negative ?
(1) n^3 [1-x^2]<0
(2) x^2-1 <0
Iam struggling with such kind of problems.I would appreciate if you help me understand teh basics here.
I think answer is E
1) n^3 [1-x^2]<0 ;
In this either n <0 or (1-x^2)< 0 ; no information
2) x^2-1 <0
x=-0.5 or x=0.5 both satisfies the condition ;insuff
Together insufficient ; having information about x^2 does not really tell us anything about x