GR9768 Q 31

Forum for the GRE subject test in mathematics.
mathQ
Posts: 41
Joined: Thu Mar 25, 2010 12:14 am

GR9768 Q 31

Postby mathQ » Tue Apr 06, 2010 2:59 pm

Which of the following CANNOT be the root of the polynomial in x of the form 9x^5 + ax^3 + b, where a and b are integers

A) -9
B) -5
C) 1/4
D) 1/3
E) 9

EugeneKudashev
Posts: 27
Joined: Tue Apr 06, 2010 8:22 am

Re: GR9768 Q 31

Postby EugeneKudashev » Tue Apr 06, 2010 3:00 pm

answer is C, 1/4. refer to rational roots theorem.

mathQ
Posts: 41
Joined: Thu Mar 25, 2010 12:14 am

Re: GR9768 Q 31

Postby mathQ » Tue Apr 06, 2010 3:06 pm

EugeneKudashev wrote:answer is C, 1/4. refer to rational roots theorem.


Awesome !!

It did not click me !!!

EugeneKudashev
Posts: 27
Joined: Tue Apr 06, 2010 8:22 am

Re: GR9768 Q 31

Postby EugeneKudashev » Tue Apr 06, 2010 3:13 pm

yeah man :) it is :) cheers. you sit on saturday too?

speedychaos4
Posts: 47
Joined: Mon Mar 22, 2010 2:42 am

Re: GR9768 Q 31

Postby speedychaos4 » Tue Apr 06, 2010 11:01 pm

EugeneKudashev wrote:yeah man :) it is :) cheers. you sit on saturday too?

Hey man, I'm gonna sit on Sat. But I don't have too much knowledge about abstract algebra and topology right now, so I'm really stressed out...




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