algebra 2
posted by amber .
What is the identity element for multiplication? What is the multiplicative inverse of 4? of 0.1? What is the familiar name for "multiplicative inverse"?

1.) Depends on what group/ring etc. you consider, for the set of the real umbers it is 1
2.) i(4)= 1/4;; i(0.1)=1 / 0.1 = 10