9. verify that if an integer is simultaneously a square and a cube (as is the case with 64 8 4), then it must be either of the form 7k or 7k+1.

9. Verify that if an integer is simultaneously a square and a cube (as is the case with 64 8 4), then it must be either of the form 7k or 7k+1. 10. For n 21,establish that the integer n(7n +5) is of the form 6k. 11 Ifn ic an add intaanr abamthat 4 2