Răspunsuri

2014-10-05T21:37:24+03:00
 2^{n+3} +2^{n+1} -2^{n} =9·4¹³
2^{n} (2³+2¹+2°)=9·4¹³
2^{n} ·9=9·4¹³
 2^{n} =4¹³
2^{n} =2²⁶
n=26