Obliczenie: LEOpR4 - 1

EX  = 
 x1* p1+ x2* p2+ x3* p3
EX =  x1* p1+ x2* p2+ x3* p3$$EX$$ = $$x1\cdot p1+x2\cdot p2+x3\cdot p3$$
EX =  p1* x1+ p2* x2+ p3* x3$$EX$$ = $$p1\cdot x1+p2\cdot x2+p3\cdot x3$$