Question

a和b互为倒数则a分之3÷4分之b等于多少集分之b除以a分之五 等于多少

Answer 1

∵a和b互为倒数，∴ ab=1
a分之3÷4分之b
=(3/a)÷(b/4)
=(3/a)×(4/b)
=12/ab
=12
(b/x)÷(5/a)
=(b/x)×(a/5)
=ab/（5x）
=1/(5x)