Question

Ex.11 va rog mult urgent

Answer 1

deci
2x-1 | 18
2x-1 | 2x-1=>2x-1€divizorilor lui 18
2x-1€{-18,-9,-6,-3,-2,-1,1,2,3,6,9,18} /+1
2x€{-17,-8,-5,-2,-1,0,2,3,7,10,19} /:2
x€{-17/2,-4,-5,2,-1,-1/2,0,1,3/2,7/2,5,19/2}
produsul elementelor= -17/2•(-4)•(-5)•2•(-1)•(-1/2)•0•1•3/2•7/2•5•19/2
=0
primessccc coroana ?