if a function f is defined by f ( x ) = - 1 / x for all non zero numbers x . if f ( a ) = - 1 / 3 and f ( ab ) = 1 / 6 then b = ?
f ( a ) = - 1 / 3 = - 1 / a , and thus a = 3 f ( ab ) = 1 / 6 , and thus ab = - 6 3 b = - 6 b = - 2 the answer is d .
divide(6, 3)