Question

Demonstrati ca numarul a = ( 2 ³⁰ + 2²⁹+2²⁸)÷7 este patrat perfect


E urgent dau coroana ​

Answer 1

$a=(2^{30} + 2^{29} +2^{28} ):7\\a=2^{28} (4+2+1):7\\a=2^{28} *7:7\\a=2^{28} \\a=(2^{14} )^{2}$

Answer 2

Sper sa te ajute:))))