Question

determinati nr. natural x stiind ca 2 la puterea 31 + 2 la puterea 30 + 2 la puterea 29 = x inmultit cu 2 la puterea 28....Multumesc!

Answer 1

$2^{31}+ 2^{30}+ 2^{29}= 2^{28} x \\ 2^{29}( 2^{2}+ 2^{1}+1)= 2^{28}x \\ x= 2^{29-28} 7 \\ x=14$