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4 questions with no upvoted or accepted answers
2 votes
0 answers
64 views

How to prove the following inequality with complete induction?

Let $n \in \mathbb{N}$, and let $a_1, ... , a_n > 0.$ Show that: I got the hint that we have to use this induction step for the induction proof: And thats what I got so far in the Induction step ...
Johnny C.'s user avatar
1 vote
0 answers
47 views

Where has this inequality come from?

Within the paper PRIMES is in P the following inequality can be found (on page 4, in the proof of Lemma 4.3) $$ n^{\lfloor \log(B) \rfloor} \prod_{i=1}^{\lfloor \log^2(n) \rfloor} (n^i - 1) \hspace{...
M Smith's user avatar
  • 2,737
0 votes
0 answers
44 views

Induction proof for product of $a^x$ is less than or equal to the sum of $x\times a$

So this type of problem has me stuck in proving some relation. I assumed to use induction but I am stuck at a certain step and cannot understand if there is a trick or perhaps my idea is just wrong: ...
thewhale's user avatar
0 votes
0 answers
45 views

Inequality with Products and Sums

I need help to find a proof for the following inquality. Assuming that $ 0 \leq c_i \leq 1 $ and $ 0 \leq d_i \leq 1 $, show that $$ \prod_{i=1}^N (c_i + d_i - c_i d_i) \geq \prod_{i=1}^N c_i + \prod_{...
Duns's user avatar
  • 778