Question

化简(a-b) 2n次方-2(b-a)的2n减1次方+(b-a)的2n次方-（a-b）的2n减1次方

Answer 1

=(a-b)^2n+2(a-b)^(2n-1)-(a-b)^(2n-1)

=(a-b)^2n+(a-b)^(2n-1)