M=(5- 1) ^n=4^n
The sum of binomial coefficients is n = 2 n
m-n=4^n-2 ^n=240=2^n *(2^n- 1)= 16 * 15
n=4
The x term in the expansion is c (4 4,2) * (5x)2 * (1/root x) 2.
=6 *25x^2 * 1/x
= 150x
So the coefficient of the x term is 150.
I hope I can help you and adopt it.
1. What high schools are there in Heze, Shandong?
1, Heze Experimental Middle School
Heze Experimental Middle School is the first experime