a,b互为倒数,则ab=__________;a,b互为负倒数,则ab=__________.
问题描述:
a,b互为倒数,则ab=__________;a,b互为负倒数,则ab=__________.
答
a,b互为倒数,则ab=1;a,b互为负倒数,则ab=-1.
a,b互为倒数,则ab=__________;a,b互为负倒数,则ab=__________.
a,b互为倒数,则ab=1;a,b互为负倒数,则ab=-1.