log2(x+3)=log2(2x-3)

2 - основание

сократить дробь 15^2n+1

                                 9^n-1*5^2n+1

н-бутан->изобутан-> 2-хлор-2-метилпропан

н-бутан->этилен->этиловый спирт

Определить тип условного предложения. Глагол, данный в скобках, поставить в нужное время. Перевести предложение:

1. If it (to rain) , we shall have to stay at home.

2.If he (to work) hard, he would have achieved great progress.

3.If you gave me your dictionary for a couple days, I (to translate) this text.

4.If should be very glad if he (to come) to my place.

5.If he is free tomorrow, he certainly (to come) to our party.

Глагол данный в скобках, поставить в нужное время:

1.My friend (to go) to the library Wednesday.

2.He (not to go) to the country yesterday.

3.Don't make noise! Father (to work).

4.You (to write) a dictation tomorrow.

5.He (to study) French before he (to enter) the university.

Выписать сложное подлежащее/дополнение. Перевести предложение:

1.The teacher wants our homework to be prepared well.

2.He was expected to pass the mathematics exam.

3.Mother is said to know the right thing to do.

4.You are supposed to graduate in four years.

5.The traveller entered the inn and ordered supper to be prepared.