Question

prove that for any integer a, one of the integers a,a+2,a+4 is divisible by 3​

Answer 1

Answer:

if we add a, a+2, a+4

a+a+2+a+4= 3a+6

3(a+2)

3(a+2) ÷3= a+2 ,hence proved.

Answer 2

prove that for any integer a,one of the integers a,a+2,a+4is divisible by 3