Why is the superposition principle only applicable to linear circuits

Why is the superposition principle only applicable to linear circuits

Because the so-called superposition is actually linear superposition
That is, f (x + y) = f (x) + F (y)
It is only applicable to linear functions
If it is a quadratic function or other functions, it is easy to verify that the equation does not hold

There is only one car for a class to go for an outing in Beishan, which is 18 kilometers away. They need to be divided into two groups
There is only one car for the class to go for an outing in Beishan, which is 18 kilometers away. There are two groups: group A takes the bus first and group B walks. When the car goes to a, group A gets off the bus and walks. The car returns to group B, and the last two groups reach Beishan station at the same time?
Solutions of binary or ternary linear equations

Suppose it takes x hours for group A to go to a by car, and Y hours for group A to walk from a to Beishan. If it takes x hours for group B to return to pick up group B, then group B finally takes Y-X hours from the origin to Beishan. As above, we can get: 60x + 4Y = 18; (Y-X) 60 = 18; (Y-X) 60 = 18, we can get y = 0.3 + X, and bring y = 0.3 + X into 60x +

1000-1-2-3-4-````-99-100=?1-2+3-4+5-6+```-100+101=?
1000-1-2-3-4-````-99-100=?
1-2+3-4+5-6+```-100+101=?
1-2+3-4+5-6+```-100+101=?
There is another - 1 + 3-5 + 7-9 + '- 97 + 99 =?

1.1000-(1+2+3+.+100)=1000-5050=-4050
2.(1-2)+(3-4)+.(99-100)+101=-50+101=51
3. Same as 2?

Who can explain the cross product of vector? What's the right-hand spiral rule for? AXB = - BXA? Is it a minus sign

Vector C = vector a, cross product vector B, the size of vector C = a * b * sin α
Sin α is the angle between vectors a and B, which is grasped by the right hand rule. The four fingers of the right hand point to the front term of the cross product formula, and then bend the four fingers in the direction of the latter term of the formula. For example, vector a x vector B is to bend the finger from a to B. vector b x vector a is to turn from B to A. After clenching the fist, the thumb direction is the direction of vector C
The difference is a minus sign

A train is moving in a straight line with uniform speed change. A person observes the movement of the train beside the track and finds that there are two adjacent trains
When a train moves in a straight line with uniform speed change, one person observes the movement of the train beside the track and finds that in two adjacent 10s, the train passes 8 cars and 6 cars respectively in front of his eyes. Each car is 8m long, and the length of the joint is not taken into account. Then the acceleration of the train is -0.16m/s ^ 2?

The average velocity is equal to the velocity at the middle of time, so
v=(8+6)*8/20=5.6m/s
v0=v-at=5.6+0.16*10=7.2m/s

How to solve LIM (x → 0) (cosx) ^ 4 / x ^ 2

If the largest term in the sequence {n (n + 4) (2 / 3)} is k, then K=------

If A1 = 10 / 3, A2 = 16 / 3 > A1, the maximum term is AK, then a (k-1) ≤ AK, a (K + 1) ≤ AK (k-1) (K + 3) (2 / 3) ^ (k-1) ≤ K (K + 4) (2 / 3) ^ k, 3 (k-1) (K + 3) ≤ 2K (K + 4) K & # 178; - 2K ≤ 9K ≤ 4 (K + 1) (K + 5) (2 / 3) ^ (K + 1) ≤ K (K + 4) (2 / 3) ^ k, K & # 178; ≥ 10K 4, k = 4

No, it's not mine?

No, it is not mine.

5.5 yuan, 5 yuan and 50 cents, right

Yeah, right!

It is known that (M 2-1) x 2 + (M + 1) x + 1 = 0 is a linear equation of one variable about X, and the value of M is obtained

∵ (M2-1) x2 + (M + 1) x + 1 = 0 is a linear equation with one variable about X, where ∵ M2 − 1 = 0m + 1 ≠ 0, the solution is m = 1