Question

prove that one and only one out of n,n+2 and n+4 is divisible by 3,where n€z+​

Answer 1

Step-by-step explanation:

we know that any positive odd integer is in the form of 3q, 3q+1,3q+2 . there are 3 cases . case 1 is 3q , case2 3q+1,case 3 is 3q+2.