Question

calculati numerele naturale x, stind ca 2(x+1)-1 este divizori cu 15.. Pls​

Answer 1

Răspuns:

2(x+1)-1 € {-15,-3,-5,-1,1,3,5,15}

2x+2€{-14,-2,-4,0,2,4,6,16}

2x€{-16,-4,-6,-2,0,2,4,14}

x€N=》 x€{0,1,2,7}