(P⼀F,i,n)(F⼀A,i,n)(F⼀P,i,n)(A⼀F,i,n)=

2025-01-07 07:18:50
推荐回答(1个)
回答1:

等于1啊
其中(P/F,i,n)和(F/P,i,n)互为倒数,
(F/A,i,n)和(A/F,i,n)互为倒数,乘积是1.