Question

Vă rog urgent a) (2n+2 + 2n+1+2n): 2n - 5;​

Answer 1

Răspuns:

$(2n + 2 + 2n + 1 + 2n) \div 2n - 5 \\ (6n + 2 + 1) \div 2 \times n - 5 \\ (6n + 3) \div 2 \times n - 5 \\ \frac{6n + 3}{2} \times n - 5 \\ \\ \frac{6n + 3}{2} - 5$