Prove-that-689-690-691-1-is-a-naturel-number-

Question Number 159750 by greg_ed last updated on 20/Nov/21

Prove that

\sqrt{689 \times 690 \times 691 + 1} is a naturel number .

Commented by Rasheed.Sindhi last updated on 20/Nov/21

P l c h e c k t h e q u e s t i o n, \sqrt{689 \times 690 \times 691 + 1}

i s n o t a n a t u r a l n u m b e r .