It is proved that a + B is also diagonalized

It is proved that a + B is also diagonalized

AB = Ba means that a and B have common eigenvectors. From the condition, a and B can be diagonalized at the same time

what ___ Do you like to fill in the plural or singular of the noun in the blank
When to use the plural and the singular?

The singular and plural can be used
What to ask and what to answer
If it's a collective noun, use the plural
Ask the sentence meaning is singular, with singular nouns
For example:
What box do you like best
What are these~

As shown in the figure, in RT △ ABC, the length of hypotenuse AB is 35, the square cdef is inscribed on △ ABC, and its side length is 12, then the perimeter of △ ABC is______ ．

As shown in the figure, let BC = a, AC = B, then A2 + B2 = 352 = 1225. ① and RT △ AFE ∽ RT △ ACB, so FecB = AFAC, that is 12a = B − 12b, so 12 (a + b) = ab

English translation
It's about computers
1.software product 2.environment 3.software crisis 4.software maintenance 5.white space 6.ever-changing 7.strength and weakness 8.persuasive techniques 9.breathtaking rewards 10.stay on 11.the cutting edge 12.the bleeding edge

1. Software products
2. Environment
3. Software crisis
4. Software maintenance
5. Space
6. Various changes
7. Strengths and weaknesses
8. Persuasion skills
9. Adventure reward
10. Stay
11. Knife edge
12. Broken outline, the edge of a chart extending to the outside of the chart frame

What is the trilateral relationship of a 60 degree triangle? For example, the 45 degree angle is 1,1, and the root is 2

1, radical 3, 2

Can you make the tea Sam
Can you make the tea,Sam?
yes,of course I can,penny
Is there any water in this kettle?
Yes,there is.
where's the tea?
It's over there,behind the teapot
The original text is like this, here behind the teapot
Why use the. Teapot is not mentioned in the previous article
Should we use behind this teapot
Then he asked where's the cups?
Cups didn't mention why the definite article was also used
Can the be used for what the eye has seen?

The teapot is used to make tea

Given that the three internal angles a, B and C of triangle ABC are in an arithmetic sequence, ab = 1, BC = 4, then the length of the central line BC on side AC is

Let B = x, a = X-D, C = x + D
A + B + C = 180 degrees
X-D + X + X + D = 180, x = 60, that is, B = 60 degrees, according to the cosine theorem
Find AC = root 13. Find the cosine of angle C
Let the midpoint of AC be D. in the triangle BCD, BC = 4, CD = 1 / 2, AC = the root of half sign 13. Then, the length of BD can be obtained by using cosine theorem

What's the difference between in the session of and in the session of and take session of?

In the position of being the subject, in the position of being the subject, eg we are in the position of those buildings.Those buildings are in the possession of us.take The little boy takes

A fraction is 13 / 27, the numerator plus a, the denominator minus a, to become 3 / 7, how much is a?
A is an unknown number

（13＋a)/(27-a)=3/7
Multiply both sides by 7 at the same time
(91+7a)/(27-a)=3
Transfer of items
[91+7a-3(27-a)]/(27-a)=0
(91+7a-81+3a)/(27-a)=0
(10+10a)/(a-27)=0
A = - 1 (denominator cannot be 0, a = 27)
It should be like this

Are uncountable nouns modified with some or any?

Some, such as some money