12. 2ˣ = 16/3 va 2ʸ = 3 bo‘lsa, x + y ning qiymatini toping.

2ˣ · 2ʸ = (16/3) · 3 = 16 = 2⁴. Demak, 2⁽ˣ⁺ʸ⁾ = 2⁴.

Javob: x + y = 4.