inequality

[Var1995]

the answer will we (d) right?

[knowpraveen]

No, B should be the right answer. x lies in between -2 and 7 i.e mathematically -2<x<7. So, necessarily x must be greater than -7.

Therefore, x>-7 should be the right answer.

Thanks.

[Var1995]

my bad! i multiplied the given constraint by - and ignored the fact that it will we be true for -x.

by the way, thanks for ur quick replies.

[knowpraveen]

you're welcome, Varsha. =)

[Var1995]

if |x|<x^2, which of the following must be true?
1. x^2>1
2. x>0
3. x<-1

i m getting confused with signs. someone pls help.

[mr_singh]

hey varsha,
just solve x^2>1 i.e x>1, x<-1 and graph |x| and x^2 and you will see that x^2 lies above of |x| for all x^2>1, hence (a) is the right option

[Var1995]

thanks

[Var1995]

someone pls help with this

[Var1995]

 

someone pls explain this solution

[Var1995]

and this too