4) 2x + 8 x+1 при х = 10, 2 0,5; 1; 3;​

Ответ:

2x + 8x + 1 = 10x + 1 \\ \\ 10 \times 10 + 1 = 101 \\ 10 \times 2 + 1 = 21 \\ 10 \times 0.5 + 1 = 6 \\ 10 \times 1 + 1 = 11 \\ 10 \times 3 + 1 = 31