Is there a concise way to prove that $\frac{ab}{a+c} \in [0, 1]$ for all $a > 0$, $b \in [0, 1]$, and $c \in [0, 1]$?
Proof that $ab/(a+c)$ is bounded for bounded $b$ and $c$
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proof-writing
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0No thanks. But I think it don't deserve that. – 2012-05-11
1 Answers
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$0\leq \frac{ab}{a+c}=\frac{b}{1+\frac{c}{a}}\leq b\leq 1$
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0It is given that a>0 – 2012-05-12