BDMO 2019, National, Secondary Q. no. 9

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ShurjoA
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BDMO 2019, National, Secondary Q. no. 9

Unread post by ShurjoA » Thu Dec 03, 2020 12:07 pm

[math] f(x+y) = xf(x)+2f(y)-x-y. f(2019) = a/b, a+b = ? [/math]

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Mehrab4226
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Re: BDMO 2019, National, Secondary Q. no. 9

Unread post by Mehrab4226 » Sat Dec 26, 2020 7:52 pm

Take $y=2019$ and $x = 0$, then you will get $f(2019)$
But the function is wierd.
The Mathematician does not study math because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
-Henri Poincaré

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