запишите четыре первых члена арифметической прогрессии если а1=2 d=-3

доказать тезис:"Наш язык-это важнейшая часть нашего общего поведения".Срочно надо,помогите пожалуйста.

Поставьте предложения в Passive Voice: 1.We didn`t recognize Alex. 2.Tom gave us a completely false idea. 3. He is giving a big party.He invites us. 4. Paul Hogan plays the leading role in this film. 5. Mother was cooking dinner from two till three. 6. My younger sister borrowed my book without asking. 7. Derek is repairing my car now. 8.She always criticizes the way I dress. 9. Kate was doing the washing at that time.