Nooblet94
Premium Member
- Joined
- Feb 5, 2011
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- HSC
- 2012
Re: HSC 2012 Marathon
I'll type up my solution after school tomorrow if nobody else has by then.
Got it, nice questionTwo of the roots of the equation x^3 + ax^2 + b = 0 are reciprocals of each other (a and b are real).
i) show that the third root is equal to -b
ii) show that a= b - 1/b
iii) show that the two roots, which are reciprocals, will be real if -0.5 < = b < = 1/2
I'll type up my solution after school tomorrow if nobody else has by then.