fa'i VUhU2 cmavo

unary mathematical operator: reciprocal; multiplicative inverse; [1/a].

On affix form:

facki
x1 discovers/finds out x2 (du'u) about subject/object x3; x1 finds (fi) x3 (object).

In notes:

pavdilcu
x1 is the reciprocal/multiplicative inverse of x2 .
sau'i
mekso n-ary operator: reciprocal of the sum of the reciprocal of each of X1, X2, ..., Xn (for any natural number n); 1/((1/X1) + (1/X.
te'o'a
unary mekso operator: natural exponentiation operator exp, where exp(a) = ea \forall a.