Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**tony123****Member**- Registered: 2007-08-03
- Posts: 216

find x

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**Bob****Administrator**- Registered: 2010-06-20
- Posts: 9,355

hi tony123

Thanks for another great exercise.

I'm still stuck with

. Prove thatEasy to show it's a possible value for x+y and the graph suggests it's unique, but I still cannot prove it properly. Hint please.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob

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**tony123****Member**- Registered: 2007-08-03
- Posts: 216

hi bob

I'm glad you liked these problems

For the acute angles problem,

Someone sent this solution hope you like it

https://www.youtube.com/watch?v=TZi-x7ctxrU

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**Bob****Administrator**- Registered: 2010-06-20
- Posts: 9,355

hi zetafunc and tony123,

Thanks for providing me with ways to do this.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob

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