Prove that 1 + 1 is greater than or equal to 2! Life problems

Prove that 1 + 1 is greater than or equal to 2! Life problems

… One plus one equals two in decimal system and ten in binary system . @ 1 + 1 is greater than or equal to 2 times the root sign under 1 I don't know the angle of the question

How is one yuan equal to one point?

Analysis: because 1 yuan = 100 points
=10 points * 10 = 100 points
=1 angle * 10 = 10 angle
=0.1 yuan * 10 = 1 yuan
=1 yuan,
Therefore, in the original title
1 yuan = 100 points
=10 points * 10 points = 100 points
=1 angle * 1 angle = 1 angle
=0.1 yuan * 0.1 yuan = 0.01 yuan
=1 is the answer that can't be set

Prove that one yuan is one cent

1 yuan = 100 points
=10 points * 10 points
=RMB 0.1 * RMB 0.1
=01 yuan
=1 point
It doesn't make any sense to make a mistake of 10 points * 10 points, 1 yuan = 10 points * 10 instead of 10 points * 10 points
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Urgent! Junior high school physics problem box: as shown in the figure, there is a constant voltage of 5V power supply and four resistances are 3 Ω in the box
As shown in the figure, there is a power supply with constant voltage of 5V in the box and four resistors with resistance values of 3 Ω are connected to form a loop. Four wires a, B, C and D are led out from the circuit. The measured voltage between AB is 5V, between CD is 2V, and between BD is zero. To meet the above conditions, the minimum resistance between AC should be ()
A 7.5 Euro B 5 Euro C 4 Euro D 3 Euro
PS: the picture shows a box in the middle, with a and B wires from top to bottom on the left and C and D wires from top to bottom on the right.)
Hurry up! Thank you!

There is no voltage between BD, so BD should be a wire; if the voltage between AB is 5V, AB should be a power supply, if the voltage between CD is 2V, then the voltage between AC is 3V. According to the characteristics of voltage division of series circuit, the voltage between AC should be 1.5 times of the voltage between CD, then the resistance between AC is 1.5 times of the resistance between CD, and if the total resistance is the smallest, so if a 3ohm resistor is placed between AC, then the resistance between CD must be 2 ohm, Therefore, CD should have a 3 ohm and 6 ohm resistor in parallel, so the minimum value between ab should be 5 ohm. Therefore, D should be selected