Question

(2x-y)的13次方乘[(2x-y)的3次方])的2次方乘[(y-2x)的2次方]的3次方,其中x=2,y=-1

Answer 1

(2x – y) 13 *[(2x – y) 3 ] 2 *[(y – 2x) 2 ] 3 = (2x –y) 13 *(2x – y) 6 *[(2x – y) 2 ] 3 = (2x– y) 19 *(2x – y) 6 = (2x – y) 25 ,把x = 2和y = -1代入可得原式 = [2*2 – (-1)] 25 = 5 25 .（答案是...