The function: f(x)=1tanx f ( x ) = 1 tan x We've written in class that the domain of this ... Please help me in factorising this equation ... Suppose that a person's score X X on a mathematics aptitude test is a number .... (fddx)p−1(f)+fdp−1dxp−1(fp−1)≡0(modp) ( f d d x ) p − 1 ( f ) + f d p − 1 d x p − 1 ( f p − 1 ) ≡ 0 ( m o d p ).