The largest positive integer that must divide nn, means for the least value of nn which satisfies the given statement in the question. The lowest square of an integer, which is multiple of 7272 is 144144 --> n2=144=122=72∗2n2=144=122=72∗2 --> nmin=12nmin=12. Largest factor of 1212 is 1212.
In the English-speaking world Anton Chekhov is by far better known for his plays than for his short stories, but it was during his lifetime that Chekhov`s stories made him popular while his plays
第二个条件的R也可能是负值,但是正值时却大于8%,因此不能判断。