7)* Продолжи ряд: 0,2; 0,5; 1.1: 2.3: 4.7: 9.5: ...

The pattern is to multiply the previous term by 2 and add 0.1.

0.2 * 2 + 0.1 = 0.5

0.5 * 2 + 0.1 = 1.1

1.1 * 2 + 0.1 = 2.3

2.3 * 2 + 0.1 = 4.7

4.7 * 2 + 0.1 = 9.5

9.5 * 2 + 0.1 = 19.1