[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 503
You are missing trading opportunities:
- Free trading apps
- Over 8,000 signals for copying
- Economic news for exploring financial markets
Registration
Log in
You agree to website policy and terms of use
If you do not have an account, please register
x1+x2=b/a
x1*x2=c/a
abc=x1
a+b+c=x2
or vice versa. Hastened my answer again.
x1+x2=b/a
x1*x2=c/a
abc=x1
a+b+c=x2
or vice versa. Hastened my answer again.
That's understandable, but what's next? =)
I'm just saying that I was too hasty with the discriminant:)
Vasya and Petya also almost killed me for posting their trade results without asking their permission.
The thermometer has already been pulled out by a concerted effort. Here's another thought, a physical one. It's an odd task:
Between pins "1" and "2", to which a constant voltage source
is connected, an electrical circuit is assembled, consisting only of
resistors. The voltage across one of the resistors is U0. Resistance
of this resistor was changed, as a result the voltage on this resistor
became U1, voltages on other resistors of the circuit also changed.
Can there be a resistor in this circuit, where voltage change
will be more than |U1 - U0| ?
2010
and the others were lined up in order of increasing mass. There is a scale with a light bulb,
which can be used to check whether two groups of weights
have the same mass. How can you tell which weight is which in 3 checks
lost?
2010
During the ball, each young man danced a waltz with a girl either prettier than the previous dance or smarter, and at least one danced with a girl both prettier and smarter. Could this be the case? (There were equal numbers of boys and girls at the ball.)
1994
Vasya and Petya also almost killed me for posting their trade results without asking their permission.
The thermometer has already been pulled out by a concerted effort. Here's another thought, a physical one. It's an odd task:
Between pins "1" and "2", to which a constant voltage source
is connected, an electrical circuit is assembled, consisting only of
resistors. The voltage across one of the resistors is U0. Resistance
of this resistor was changed, as a result the voltage on this resistor
became U1, voltages on other resistors of the circuit also changed.
Can there be a resistor in this circuit, where voltage change
will be more than |U1 - U0| ?
2010
But how would you prove this to schoolchildren who have only heard of amplifiers?