Explicație pas cu pas:
24. 2^n+3-2^n+1-2^n=2^n×(2^3-2^1-1)=2^n×(8-2-1)=2^n×5 rezulta ca 2^n+3-2^n+1-2^n=M5
25. 11×5^n+4×5^n+1+5^n+2=5^n×(11+5+2)=5^n×18
Răspuns:
