(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²当x=2时,求代数式(1- x/3)(1+ x/3)(1+ x^2/3)(1+ x^4/81)的值漏了,还有一题m- 1/4(1-m)- 1/3m(2-m/4)

问题描述:

(x的n次方+y的n次方)(x的n次方-y的n次方)-(x的n次方+y的n次方)²
当x=2时,求代数式(1- x/3)(1+ x/3)(1+ x^2/3)(1+ x^4/81)的值
漏了,还有一题
m- 1/4(1-m)- 1/3m(2-m/4)