2X + 3Y equals 100, where x and y are natural numbers and Y is even or odd
Because 2x must be even, even + a = 100 (even)
It can only be an even number;
If 3Y is even, only if y is even can 3Y be even;
So y is even
RELATED INFORMATIONS
- 1. Sum of coefficients in (2x-3y) ^ 9 expansion The sum of the absolute values of the coefficients is equal to
- 2. X is an integer, 2x + 1 is the sum of odd and even prime numbers Explain why
- 3. Is the sum of 1 and 101 odd or even?
- 4. Try to find the coefficients of x ^ 6 and x ^ 3 in the expansion of (x ^ 5-2x ^ 4 + 3x ^ 3-x ^ 2-x + 2) (x ^ 3 + 3x ^ 2 + 3x-7)
- 5. 2(3-x)-4(2x+5)=6-7(2-3x)
- 6. It is known that the solution of the system of X. y equations 2x + 3Y = k, 3x + 5Y = 56 is - 12, and the value of K is obtained
- 7. N + 1 power of N and (n + 1) power of N, compare the size
- 8. The size relation of N + 1 power of N and N + 1 power of n
- 9. The relationship between the power of N + 1 and the power of N + 1
- 10. If x square + y square of the circle is 25, and the tangent of the circle is taken at the last point m (- 3,4), then the tangent equation is?
- 11. Find the coefficient of x ^ 2 in the expansion of (1 + x) (1 + 2x) · (1 + NX)
- 12. In the expansion of X (1-x) ^ 4 + x ^ 2 (1 + 2x) ^ 8 + x ^ 3 (1 + 3x) ^ 12, the coefficient of x ^ 4 is
- 13. If a is a matrix of order n and the determinant of a is 3, then | 2A inverse-a*|=
- 14. What is the determinant of 3x3
- 15. Determinant solution equation D, known d = 0, the first row a, B, C, D + X, the second row a, B, C + X, the third row a, B + X, C, D, the fourth row a + X, B, C, D
- 16. The first behavior of the third-order determinant is 1 A, 1,1, the second behavior is 1,1 B, 1, and the third behavior is 1,1,1 C. find the value of this determinant
- 17. How to find the first row of determinant ax + by ay + BZ AZ + BX, the second row ay + BZ AZ + BX ax + by, the third row AZ + BX ax + by ay + BZ? I know, but the problem is that after three lines are added and the common factor is raised, it can't be transformed into a triangular matrix to solve it. Let's talk about it
- 18. Ax ^ 2 + BX + C = 0, if a + B + C = 0, then there must be a root of?
- 19. How to find the determinant | a + B |? Let | a | = det (A1, A2, A3, A4) = 3, | B | = det (B1, A2, A3, A4) = - 5, and find | a + B|
- 20. Using determinant property to calculate (need process): (x, y, x + y; y, x + y, X; X + y, x, y)