Range of f(x) (2)

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jagdish
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Range of f(x) (2)

Unread post by jagdish » Thu Jun 02, 2011 9:46 pm

If $a^2+c^2>ab$ and $b^2>4c^2$ for all $x\in \mathbb{R}$

then Range of $\displaystyle f(x) = \frac{x+a}{x^2+bx+c^2}$
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