glittergal96
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- Jul 25, 2014
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- HSC
- 2014
Re: HSC 2014 4U Marathon
so at least one term on the LHS must be non-positive. As each of these polynomials is concave up, at least one must be concave up with vertex on below the x-axis. This polynomial must then have at least one real root.
We have
so at least one term on the LHS must be non-positive. As each of these polynomials is concave up, at least one must be concave up with vertex on below the x-axis. This polynomial must then have at least one real root.