Ответы и объяснения

2013-04-15T22:37:10+04:00

1.

7,19,31,43,55,67,79

2.

47,39,31,23,15,7,-1

3.

11, 17, 23, 29, 35, 41,47

4.

56,40,24,8,-8,-24,-40