Inequities

[alsergi]

Please help me with this problem, I thought I kew how to solve it, but ...

If a^2= b Is a between 0 and 1 ?

1. a^3 > 0
2. b < a

Thank you very much!!

[4meonly]

1.- a^3 > 0
2.- b < a

Minus after dots means sigh?
Or this is
1. a^3 > 0
2. b < a
?

[mim3]

[quote="alsergi"]Please help me with this problem, I thought I kew how to solve it, but ...

If a^2= b Is a between 0 and 1 ?

1. a^3 > 0
2. b < a

Thank you very much!![/quote]

Hi Alsergi,

Here's the way I thought about it:

1. a^3 > 0
From this we know that a is positive. We do not know, however, if a is a fraction (b/t 0 & 1) so it's insufficient

2. b< a
because a^2=b, we know that b HAS to be positive. So, if b< a, we know that a is positive as well. The only way for b< a is if a is a fraction. Thus, sufficient.

So I say it's B. What's the OA?

[alsergi]

Yes, I see your point, the result is B.

Thank you very much!!