Найти D(f) по схеме
(√x  -3)(x^2+1)<0

Put the verb into the correct form:

1)  I (be) never late for classes.

2) He (arrive) three days ago,

3) This time next week i (swim) in the sea.

4) It (rain) when i (go out)

5) He (study) Economics at Moscow University.

6) I (be) 35 years old next week.