Find out the monomials in the following formulas, write the coefficients and times. 2A / 35A + 2B - Y 1 / π (PAI) x ^ 2 y 2 ^ 5x ^ 7 A / BC Write the coefficients and times -X squared by Y squared by Z / 3 Fast, urgent, all to add wealth value

Find out the monomials in the following formulas, write the coefficients and times. 2A / 35A + 2B - Y 1 / π (PAI) x ^ 2 y 2 ^ 5x ^ 7 A / BC Write the coefficients and times -X squared by Y squared by Z / 3 Fast, urgent, all to add wealth value

2A / 3, the number is 1, the coefficient is 2 / 3
-y. The degree is 1 and the coefficient is - 1
1 / π (PAI) x ^ 2Y, degree 3, coefficient 1 / π
2 ^ 5x ^ 7, the degree is 7, and the coefficient is 32
-The square of x times the square of Y times the square of Z / 3, the degree is 5, and the coefficient is - 1 / 3

1. In the expansion of (5a + 7b) ^ n, if the binomial coefficients of item 5 and Item 9 are equal, then n=_____ ;

Because the binomial coefficients of two directions are equal
That is: 4cn = 8cn
The solution is n = 12

The sum of the coefficients of each item in the expansion of (a + b) ^ n is 256. Write the binomial coefficients of each item in the binomial expansion in order;

Now a = b = 1. We can get n = 8. We can expand it by binomial expansion