Difference between stainless steel 201 and 202

The price is different, the nickel content is different, the processing performance is different, and the antirust ability is different. In general, 201 is worse than 202. It depends on where you use it, where the requirements are not high. 201 can save the cost

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1. 1 / 10 * 11 + 1 / 11 * 12 + 1 / 12 * 13= There's another question that won't be 2 * 3 / 1 + 3 * 4 / 1 + 4 * 5 / 1.99 * 100 / 1
2. This year, three times of Xiaogang's age is equal to five times of Xiaofang's age. Ten years later, if four times of Xiaogang's age is equal to five times of Xiaofang's age, Xiaogang's age this year will be five times______ I'm 40 years old
3. 6X + 5 = 7x + 6 to solve the equation
4. 13.6% without the percent sign, this number is expanded or reduced
5. Only the percentage sign of 1.12.5% is removed. This number () a is expanded by 10 times B and reduced by 100 times C. the size remains unchanged and cannot be judged
6. Decomposition factor: M + 1 power of (x + y) minus M-1 power of (x + y), M is an integer greater than 1
7. Decomposition factor (x + y) to the power of M + 1 - (x + y) to the power of M-1 (integers with m greater than 1)
8. Factorization: y ^ n-y ^ (n-2), (n is an integer and N is greater than 2)
9. Can you help me calculate the eigenvalues and eigenvectors of the matrix now The matrix is: 1 3 1 / 5 1 / 2 1 / 6 1 1/3 1 1/4 2 1/3 2 5 4 1 1 1/3 2 2 1/2 1 1 1/5 2 6 3 3 5 1 4 1 1/2 1/2 1/2 1/4 1
10. Who can help calculate the eigenvalues and eigenvectors of this matrix? The fifth order matrix is as follows. I use matlab to work out why the vector is negative, 1 1/4 1/5 2 1/2 4 1 1/2 5 3 5 2 1 7 4 1/2 1/5 1/7 1 1/3 2 1/3 1/4 3 1
11. The 24th power of number 7 can be divided by two integers between 40 and 50 (excluding 50)
12. Let a = {a, B, C, D, e, F, G}, a partition of a = {a, B}, {C, D, e}, {F, G}, then the corresponding equivalence relation is____ A binary
13. Let B be an invertible matrix, a be a square matrix of the same order as B, and satisfy A2 + AB + B2 = 0. It is proved that a and a + B are invertible matrices
14. It is known that line AB = 20cm, there is a point C on line AB, and BC = 10cm, M is the key point of line AC, and the length of line am is calculated To write the solution: Because so
15. It is known that the product of the first three terms of the increasing equal ratio sequence {an} is 512, and the three terms are subtracted by 1, 3 and 9 to form the equal difference sequence. The general term formula of the sequence {an} is obtained
16. Solving equation (12x-10) / (4x-3) + (32x-34) / (8x-9) = (24x-23) / (8x-7) + (16x-19) / (4x-5)
17. 3 + 0.7x = 10
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19. It is known that 3a-1 and 13-5a are the square roots of X. to find the value of X, whether there should be two solutions (the answer is two solutions), why? There are specific answers To explain why there are two solutions
20. It is known that the 24th power - 1 of 2 can be divided by two integers between 0 and 10 sit back and wait