Factorization of 1 / 3A ^ 2x ^ 4-3b ^ 2Y ^ 6 Come on!

Factorization of 1 / 3A ^ 2x ^ 4-3b ^ 2Y ^ 6 Come on!

=(1/3)(a^2x^4-9b^2y^6)
=(1/3)(ax^2+3by^3)(ax^2-3by^3)

The difficult problem of solving polar coordinate equation of straight line
Find the linear equation of point (2, π / 3) and perpendicular to the polar axis, please draw the figure, 1

Let the line and the polar axis be compared with point a, and let the known point be B (2, π / 3)
Obviously, OA = 2 * cos π / 3 = 1
Let a point on a straight line be (ρ, θ)
Obviously, ρ cos θ = 0A = 1
So the equation of a straight line is
ρcosθ=1

As shown in the figure, in △ ABC and ade, ab = AC, ad = AE, and ∠ BAC = ∠ DAE, point E is on BC. Through point D, make DF ‖ BC, connect dB. Verify: (1) △ abd ≌ △ ace; (2) DF = CE

(1) It is proved that in △ bad and △ CAE ≌ ad = AE ≌ bad = eacab = AC, ≌ bad ≌ CAE (SAS); (2) it is proved that ≌ bad ≌ CAE, ≌ DBA = C, ∵ AB = AC, ≌ C = ABC, ≌ D

How many cubic meters is a ton of stone

1t = 1000kg. Ton is the unit of weight. Cube is the unit of volume. The two cannot be compared. This is related to the material of stone

1. F (x) = (x + 1) ^ 2 2. F (x) = 2 ^ x 3. F (x) = log2 (x) (x1 is not equal to x2) can make f ((x1 + x2) / 2)

f(x)=(x+1)^2 2.f(x)=2^x 3
These two are OK

The base length of an isosceles triangle is 15cm, the waist is a cm and the height is B cm. The perimeter of this isosceles triangle is () cm and the area is () cm2

Perimeter 15 + 2A
Area 7.5B

The effective value of a sinusoidal voltage is 220 V, and the frequency is 50 Hz. When t is equal to 0, the value u is equal to 220 v

220 = 220√2 sin θ
θ = 45°
u = 220√2 sin (314t + 45°）

Given that u = {1, 2, 3, 4, 5, 6, 7, 8}, a ∩ (∁ UB) = {1, 8}, (∁ UA) ∩ B = {2, 6}, (∁ UA) ∩ (∁ UB) = {4, 7}, then set a=______ ．

From a ∩ (cub) = {1,8}, we get element 1,8 ∈ a, and 1,8 ∉ B, from (CUA) ∩ B = {2,6}, we get element 2,6 ∈ B, and 2,6 ∉ a, and (CUA) ∩ (cub) = {4,7}, we get 4,7 ∉ a, and 4,7 ∉ B, in conclusion, we get element 2,4,6,7 ∉ a, from the complete set u = {1,2,3,4,5

Draw and calculate the known line CD, extend CD to B, make DB = 0.5cb, reverse extend CD to a, make CA = CB, if AB = 12, find the length of CD!

Because CA = CB, ab = 12
So CB = 1 / 2Ab = 1 / 2 × 12 = 6
Because DB = 0.5cb = 0.5 × 6 = 3
So CD = cb-db = 6-3 = 3

1 -1 2 1 -1 2
A ^ 2 = 0 1 - 1 * 0 1 - 1 the braces in the middle will not be drawn by computer!
1 2 1 1 2 1
It's a matrix multiplication! Which row is multiplied by which column? Can you be more specific? In the end, it seems to be a matrix with three rows and three columns? Which formula is used? Can you give another example?
yes
1 -1 2 1 -1 2
A^2= 0 1 -1 * 0 1 -1
1 2 1 1 2 1

Matrix a multiplies matrix B to get matrix C. The method is that the elements in the first row of a are respectively multiplied by the elements in the first column of B to get C11, the elements in the first row of a are multiplied by the elements in the second row of B to get C12, and so on. The elements in the second row of C are the elements in the second row of a, and so on, The number of columns of a should be equal to the number of rows of B
The answer is still on your own