1. If 'x' and 'y' are positive integers (4^x)(1/3)^y <1?
(1) y=2x
(2) y=4
2. Is a^2 - a >= 0
(1) 7>=a>=1
(2) 3>=a>=0
(1) y=2x
(2) y=4
2. Is a^2 - a >= 0
(1) 7>=a>=1
(2) 3>=a>=0
I think for qn 1,the eqn can be simplified as
is 4^x3^-y<1? from statement 1 , the eqn becomes is4^x/ 3^(x^2) <1? you can try substituting any positive integers for x. The outcome is always less than 1. Hence statement 1 is sufficient.
No information of x in statement 2. So Ans is A.
For qn no 2, statement 1 fails for the condition a=1 where 0>0 is undefined and also statement 2 fails for the condition a=0. Hence answer can be E.
BTW, what is the OA?
